specifying requirements for electrical and lighting management systems (elms) based on ntcip 1213...
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A306b: Specifying Requirements for Electrical and
Lighting Management Systems (ELMS) Based on NTCIP 1213 Standard
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Instructor
James J. FrazerPresidentGridaptive TechnologiesPompano Beach, Florida, USA
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Target Audience
Engineering staff Street lighting maintenance staff Traffic management center (TMC)/Operations staff System developers Private and public sectors users including manufacturers
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Recommended Prerequisite(s) I101: Using ITS Standards: An Overview
A101: Introduction to Acquiring Standards-based ITS Systems
A102: Introduction to User Needs Identification
A201: Details On Acquiring Standards-based ITS Systems
C101: Introduction to the Communications Protocols and Their Uses in ITS Applications
A306a: Understanding User Needs for Electrical and Lighting Management Systems (ELMS) Based on NTCIP 1213 Standard
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Curriculum Path (SEP)I101
Using ITS Standards: An Overview
A101Introduction to
Acquiring Standards ‐based
ITS Systems
A102Introduction to User Needs Identification
A201Details on Acquiring Standards‐based ITS
Systems
C101Intro. to Comm.
Protocols and Their Use in ITS
Applications
A306aUnderstanding User Needs for
Electrical and LightingManagement Systems(ELMS) Based on NTCIP
1213 Standard
A306bSpecifying Requirements for
Electrical and LightingManagement Systems(ELMS) Based on NTCIP
1213 Standard
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Learning Objectives
1. Review the structure of the NTCIP 1213 v02 Standard2. Use the Protocol Requirements List (PRL) to specify
the standardized structure of requirements 3. Include the requirements from the PRL in the
specification4. Explain how interoperability is achieved through the
Requirements Traceability Matrix5. Examine the benefits of the SEP approach regarding
verification and validation in the ELMS testing process6. Explain conditions and context for extending the
standard including specifying requirements not covered by standard
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Learning Objective # 1 – Review the Structure of the NTCIP 1213 Standard
Summarize NTCIP 1213 Capabilities Identify components of the standard, ConOps, Requirements, Dialogs, MIB, PRL, RTM Focus on Requirements State what this standard does not have (e.g., test cases)
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Capabilities of NTCIP 1213 Systems
Learning Objective # 1
Control and monitoring of terminal devices for:
Roadway lighting, including scheduling and zoning Safety: electrical leakage anomalies, including power quality and ground fault issues Revenue grade power metering
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Capabilities of NTCIP 1213 Systems
Learning Objective # 1
Integration with other systems including:
Vehicle to Grid Infrastructure The electrical distribution network (The Smart Grid) Electric vehicle charging infrastructure
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NTCIP 1213 System Configurations
Learning Objective # 1
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Graphics: Gridaptive Technologies
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Learning Objective # 1
© US DOT 2012
The USDOT Framework
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The US Smart Grid Framework
Learning Objective # 1
Subhead (Arial Bold 28 PT Green)
Text (Arial 24 PT Black)
Bullets Bullet 1 Bullet 2 Bullet 2
Sub bullets
NTCIP 1213
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Structure of the NTCIP 1213 Standard
Learning Objective # 1
Components of the Standard
Section 1: General Section 2: Concept of Operations Section 3: Functional Requirements Section 4: Dialog Specifications Section 5: Electrical and Lighting Management System Master Object Definitions
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Structure of the NTCIP 1213 Standard (Cont.)
Learning Objective # 1
Components of the Standard
Annex A: Requirements Traceability Matrix (RTM) Annex B: Object Tree Annex C: Revised Object Definitions for Astronomical Clock
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Missing Components of NTCIP 1213
Learning Objective # 1
Test Cases
Does not include Test Cases Need to be produced for each project For more on testing, please examine:
T101: Introduction to ITS Standards Testing T201: How to Write a Test Plan T202 Overview of Test Design Specifications, Test Cases, and Test Procedures
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Learning Objective # 1
a) Roadway lighting, including scheduling and zoning b) Safety: electrical leakage anomalies, including power
quality and ground fault issues c) Revenue grade power metering d) Wiring specifics
Which choice is not a capability of the NTCIP 1213 standard?
Answer Choices
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Learning Objective # 1
Review of answersa) Roadway lighting, including scheduling and zoning
Incorrect. This is a core capability of NTCIP 1213.
b) Safety: electrical leakage anomalies, including power quality and ground fault issues Incorrect. This is a core capability of NTCIP
1213.
c) Revenue grade power metering Incorrect. This is a core capability of NTCIP 1213.
d) Wiring specificsCorrect. NTCIP 1213 does not support wiring specifics.
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Summary of Learning Objective # 1Review the Structure of the NTCIP 1213 Standard
We summarized the capabilities of the NTCIP 1213 standard We identified the components of the standard We focused on requirements We stated what this standard does not have
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Learning Objective # 2 – Use the Protocol Requirements List (PRL) to specify the standardized structure of requirements
The PRL is a table that is a tool included in the standard for use by the system developers, agency specifiers, and producers of ELMS equipment
Properly trace user needs to requirements
Within a PRL, select a given range of a performance requirement
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Use the PRL to Trace User Needs to Requirements
Learning Objective # 2
A Subset of the PRL Table
Source: NTCIP 1213
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Use the PRL to Trace User Needs to Requirements
Learning Objective # 2
User Need IDs in the PRL Table
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Use the PRL to Trace User Needs to Requirements
Learning Objective # 2
User Needs in the PRL Table
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An Example User Need –Retrieve Luminaire Information
Learning Objective # 2
Examining User Need 2.4.2.1.1.1
2.4.2.1.1.1 Retrieve Luminaire InformationThe system manager needs to be able to determine the capabilities of the ELMS. This manager may need to configure the ELMS luminaire to retrieve pole identifiers, locations, modes, zones, and vendor information for each luminaire.
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Use the PRL to Trace User Needs to Requirements
Learning Objective # 2
The Functional Requirement Identifier
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Use the PRL to Trace User Needs to Requirements
Learning Objective # 2
The Functional Requirements Column
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Requirements for Retrieve Luminaire Information
Learning Objective # 2
Examining 3.4.1.1.1.1
3.4.1.1.1.1 Retrieve Luminaire Pole IdentifierA management station shall able to retrieve from the ELMS device the pole identifier to which a luminaire is attached.
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Requirements for Retrieve Luminaire Information
Learning Objective # 2
3.4.1.1.1.2 Retrieve Luminaire Location - A management station shall be able to retrieve the location of the luminaire from the ELMS device. The location information shall be in one of the following forms:
3.4.1.1.1.2.1 Specify Location in Longitude/Latitude3.4.1.1.1.2.2 Specify Location Information Using Textual Description of a Road/Street/Block Name/Number3.4.1.1.1.2.3 Specify Location in Local Reference Coordinate Grid
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Requirements for Retrieve Luminaire Information
Learning Objective # 2
3.4.1.1.1.3 Retrieve Luminaire Mode - A management station shall be able to retrieve the current operating mode of the luminaire from the ELMS device.
3.4.1.1.1.4 Retrieve Luminaire Zone - A management station shall be able to retrieve the zone identifier(s) for a luminaire from the ELMS device.
3.4.1.1.1.5 Retrieve Luminaire Vendor Information - A management station shall be able to retrieve the information on the version, make, and model of the luminaire from the ELMS device.
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ELMS Requirements are “Well-formed”
Learning Objective # 2
[Actor] [Action] [Target] [Constraint] [Localization]
Actor – Identifies who or what does the actionAction – Identifies what is to happenTarget – Identifies who or what receives the actionConstraint – Identifies how to measure success or failure of the requirementLocalization – Identifies the circumstances under which the requirement appliesLocalization and constraint portions are important, but not all requirements will have both.
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Example of an ELMS Requirement
Learning Objective # 2
A management station shall be able to retrieve the location of the luminaire from the ELMS device
Actor - management station Action - be able to retrieveTarget - the ELMS deviceConstraint - location of the luminaire
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Section 3 Functional Requirements
Learning Objective # 2
3.1 Tutorial [Informative]3.2 Protocol Requirements List (PRL)3.3 Operational Environment Requirements3.4 Functional Requirements3.5 Supplemental Requirements
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Section 3.3 Operational Environment Requirements
Learning Objective # 2
3.3.1 Provide Live Data3.3.2 Provide Off-Line Log Data3.3.3 Monitor Exceptional Conditions
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Section 3.4 Functional Requirements
Learning Objective # 2
3.4.1 Configure ELMS Device3.4.2 Control Device3.4.3 Monitor Device Status
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Section 3.5 Supplemental Requirements
Learning Objective # 2
3.5.1 Supplemental Requirements for Scheduled Operations3.5.2 Supplemental Requirements for Zones3.5.3 Supplemental Requirements for Dim Levels3.5.4 Supplemental Requirements for Event Logs3.5.5 Supplemental Requirements for Live Data
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Learning Objective # 2
a) Configure ELMS Device b) Control Device c) Monitor Device Status d) Backwards Compatibility Requirements
Which of the following is not a major group of requirements in NTCIP 1213?
Answer Choices
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Learning Objective # 2
Review of answersa) Configure ELMS Device
Incorrect. These requirements provide for configuring ELMS field devices.
b) Control Device Incorrect. These requirements provide for controlling the ELMS field device.
c) Monitor Device Status Incorrect. These requirements provide for monitoring alarms and device status.
d) Backwards Compatibility Requirements Correct. As the first published version of the standard, it does not have any backwards compatibility issues with which to deal.
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Including PRL Requirements in the ELMS Specification:
Learning Objective # 2
Conformance
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Including PRL Requirements in the ELMS Specification:
Learning Objective # 2
Conformance
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Including PRL Requirements in the ELMS Specification:
Learning Objective # 2
Project Requirements
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Including PRL Requirements in the ELMS Specification:
Learning Objective # 2
Project Requirements
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Examining the PRL's Additional Project Requirements:
Learning Objective # 2
Performance Criteria
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Summary of Learning Objective #2 Use the Protocol Requirements List (PRL) to specify the standardized structure of requirements.
To properly trace user needs to requirementWithin a PRL, to select a given range of a performance
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Learning Objective # 3 – How to Include the Requirements from the PRL in the Specification
How to compare and contrast vendor PRLs for off-the-shelf interoperability analysis
Explain how it fits into the big picture
Explain how ELMS fits in the smart grid infrastructure
Properly tracing User Needs to Requirements
Creating a Specification, Overview, Contents, and Considerations
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Using the PRL to Build a Specification:Washington State DOT Case Study
Learning Objective # 3
In preparing the communications interface specification for a large bridge and tunnel project, many user needs were identified.
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Using the PRL to Build a Specification:Washington State DOT Case Study
Learning Objective # 3
Control lighting system lumen output by current ambient light level (adaptive lighting) Control lighting fixtures by zones of branch circuits Configure branch circuits into alternate zones Configure, control, and monitor branch circuits Configure schedules for branch circuit zones Report exceptional conditions in a near real-time basis Override schedules as required
These Needs Included the Ability to:
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Using the PRL to Build a Specification:Washington State DOT Case Study
Learning Objective # 3
Configure, control, or monitor Luminaires Electrical services Ground fault equipment Arc fault equipment
Provide Smart Grid information to the local electric utility
These Needs Do Not Include the Ability to:
Photo: Gridaptive Technologies
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Building Project Specifications Using the PRL
Learning Objective # 3
Provide Live Data
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Building Project Specifications Using the PRL
Learning Objective # 3
Provide Off-Line Log Data
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Building Project Specifications Using the PRL
Learning Objective # 3
Provide Luminaire Switch State Logging
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Building Project Specifications Using the PRL
Learning Objective # 3
Provide Luminaire Lamp Condition Logging
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Building Project Specifications Using the PRL
Learning Objective # 3
Provide Luminaire Burn Condition Logging
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Building Project Specifications Using the PRL
Learning Objective # 3
Provide Periodic Luminaire Burn Time Logging
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Building Project Specifications Using the PRL
Learning Objective # 3
Provide Periodic Luminaire Temperature Logging
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Building Project Specifications Using the PRL
Learning Objective # 3
Provide Periodic Luminaire Pole Condition Logging
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Building Project Specifications Using the PRL
Learning Objective # 3
Provide Relay Switch State Logging
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Building Project Specifications Using the PRL
Learning Objective # 3
Provide Power Meter Switch State Logging
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Building Project Specifications Using the PRL
Learning Objective # 3
Provide Periodic Power Meter Measurement Logging
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Building Project Specifications Using the PRL
Learning Objective # 3
Provide Power Meter Condition Logging
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Building Project Specifications Using the PRL
Learning Objective # 3
Provide Ground Fault Switch State Logging
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Building Project Specifications Using the PRL
Learning Objective # 3
Provide Periodic Ground Fault Measurement Logging
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Building Project Specifications Using the PRL
Learning Objective # 3
Retrieve Logged Data
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Building Project Specifications Using the PRL
Learning Objective # 3
Monitor Exceptional Conditions
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Building Project Specifications Using the PRL
Learning Objective # 3
Features
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Building Project Specifications Using the PRL
Learning Objective # 3
Configure ELMS Device
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Building Project Specifications Using the PRL
Learning Objective # 3
Configure Luminaire
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Building Project Specifications Using the PRL
Learning Objective # 3
Retrieve Luminaire Information
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Building Project Specifications Using the PRL
Learning Objective # 3
Configure Luminaire Identification Information
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Building Project Specifications Using the PRL
Learning Objective # 3
Configure Luminaire Mode
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Building Project Specifications Using the PRL
Learning Objective # 3
Configure Electrical Service
/ No
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Building Project Specifications Using the PRL
Learning Objective # 3
Retrieve Electrical Service Information
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Building Project Specifications Using the PRL
Learning Objective # 3
Configure for Light-Activated Operation
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Building Project Specifications Using the PRL
Learning Objective # 3
Configure for Scheduled Operation
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Building Project Specifications Using the PRL
Learning Objective # 3
Configure Zones
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Building Project Specifications Using the PRL
Learning Objective # 3
Configure for Manual Operation
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Building Project Specifications Using the PRL
Learning Objective # 3
Configure Stagger Interval
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Building Project Specifications Using the PRL
Learning Objective # 3
Configure Dim Levels
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Building Project Specifications Using the PRL
Learning Objective # 3
Configure Electrical Service Monitoring and Metering Equipment
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Building Project Specifications Using the PRL
Learning Objective # 3
Configure Branch Circuit
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Building Project Specifications Using the PRL
Learning Objective # 3
Retrieve Branch Circuit Information
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Building Project Specifications Using the PRL
Learning Objective # 3
Configure Branch Circuit
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Building Project Specifications Using the PRL
Learning Objective # 3
Control Device
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Building Project Specifications Using the PRL
Learning Objective # 3
Control Luminaire
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Building Project Specifications Using the PRL
Learning Objective # 3
Control Electrical Service
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Building Project Specifications Using the PRL
Learning Objective # 3
Control Branch Circuit
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Building Project Specifications Using the PRL
Learning Objective # 3
Control Devices By Zone
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Building Project Specifications Using the PRL
Learning Objective # 3
Monitor Device Status
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Building Project Specifications Using the PRL
Learning Objective # 3
Monitor Luminaire
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Building Project Specifications Using the PRL
Learning Objective # 3
Monitor Electrical Service
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Building Project Specifications Using the PRL
Learning Objective # 3
Monitor Branch Circuit
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Building Project Specifications Using the PRL
Learning Objective # 3
Supplemental Requirements
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Building Project Specifications Using the PRL
Learning Objective # 3
Supplemental Requirements for Scheduled Operations
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255
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Building Project Specifications Using the PRL
Learning Objective # 3
Supplemental Requirements for Zones
100999
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Building Project Specifications Using the PRL
Learning Objective # 3
Supplemental Requirements for Dim Levels
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Building Project Specifications Using the PRL
Learning Objective # 3
Supplemental Requirements for Event Logs
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Building Project Specifications Using the PRL
Learning Objective # 3
Supplemental Requirements for Live Data
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Using the PRL in a Specification
Learning Objective # 3
As Part of the Interface Specification
A completed PRL defines the requirements for the NTCIP interface
A deployment may need multiple interface specificationso Management systems that support multiple deviceso May need support for legacy protocol
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Using the PRL in a Specification
Learning Objective # 3
Compare and contrast vendor PRLs for off-the-shelf interoperability analysis
Once your project specific PRL is complete, you can use it to determine:
If off-the-shelf solutions are available Which vendor’s product fits your application best Whether custom development is required Which vendor’s products are interoperable, and exactly which features are interoperable
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Using the PRL in a Specification
Learning Objective # 3
Consistency
The interface specification must be consistent with the remainder of the specification
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Using the PRL in a Specification
Learning Objective # 3
Sample Text for Use in a Specification
The PRL should be properly introduced within the specification.
A copyright disclaimer should appear with the PRL.
Refer to the student supplement for guidance on wording used to introduce the PRL.
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Learning Objective # 3
a) Retrieve luminaire locationb) Configure luminaire modec) Configure branch circuit zoned) Retrieve wiring particulars
Which choice is not a functional requirement contained in the NTCIP 1213 PRL?
Answer Choices
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Learning Objective # 3
Review of answersa) Retrieve luminaire location
Incorrect. This is a functional requirement of NTCIP 1213.
b) Configure luminaire modeIncorrect. This is a functional requirement of NTCIP 1213.
c) Configure branch circuit zoneIncorrect. This is a functional requirement of NTCIP 1213.
d) Retrieve wiring particularsCorrect. NTCIP 1213 does not support retrieval of wiring particulars.
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Summary of Learning Objective # 3 How to include the requirements from the PRL in the specification
We demonstrated how to compare and contrast vendor PRLs for off-the-shelf interoperability analysis.We explained how ELMS fits in the smart grid infrastructure architecture.We properly traced user needs to requirements.We created a specification, overview, contents, and considerations.
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Learning Objective # 4 – Explain How Interoperability is Achieved through the Requirements Traceability Matrix
Explain source requirement and how it is selected in RTM
Explain link to dialogs, objects, and block objects
Learn how dialogs and messages in RTM are communicated to the field device using SNMP
Provide complete description of how a specification is to be created to support the complete end-to-end example
Provide example of how monitoring of ELMSs work
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Using the Requirements Traceability Matrix (RTM)
Learning Objective # 4
Achieving Interoperability and Interchangeability
How the RTM traces to a single design Annex A contains the RTM The RTM maps requirements to a specific design
How to compare for interoperability How to compare for interchangeability
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Using the Requirements Traceability Matrix (RTM)
Learning Objective # 4
The Requirement ID Column
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Using the Requirements Traceability Matrix (RTM)
Learning Objective # 4
The Requirement Column
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Using the Requirements Traceability Matrix (RTM)
Learning Objective # 4
The Dialog ID Column
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Using the Requirements Traceability Matrix (RTM)
Learning Objective # 4
The Dialog Column
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Using the Requirements Traceability Matrix (RTM)
Learning Objective # 4
The Object ID Column
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Using the Requirements Traceability Matrix (RTM)
Learning Objective # 4
The Object Column
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Using the Requirements Traceability Matrix (RTM)
Learning Objective # 4
Summarizing the RTM
The RTM Maps each requirement to one specific design Is a precise dialog Is a precise list of objects All of the objects must be supported if the requirement is supported
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Using the Requirements Traceability Matrix (RTM)
Learning Objective # 4
How to Compare for Interoperability
The RTM provides interoperability of requirements
The PRL indicates which requirements are supported
Comparison of PRLs allow quick determination of interoperability
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Learning Objective # 4
Comparison of PRLsFor Interoperability and Interchangeability
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Comparison of PRLs
Learning Objective # 4
For Interoperability
If both the TMS and the ELMS support a feature Interoperability is provided
If the TMS supports, but ELMS does not TMS can still use other features (typically) TMS can still interoperate with feature with other devices
If ELMS supports, but TMS does not Feature could be used by other/future TMS Feature can potentially be used manually
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Comparison of PRLs
Learning Objective # 4
For Interchangeability
Both support a feature Equipment is interchangeable for feature
New equipment supports; old one does not New equipment is interchangeable (meets or exceeds)
Old equipment supports; new ones do not Feature will not be supported Is feature needed?
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Learning Objective # 4
a) All of the objects must be supportedb) At least one of the objects must be supportedc) All of the objects must be supported if the requirement is
supportedd) At least one of the objects must be supported if the
requirement is supported
What does the following table mean?
Answer Choices
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Learning Objective # 4
Review of answersa) All of the objects must be supported
Incorrect. They only need to be supported if the requirement has been selected in the PRL.
b) At least one of the objects must be supportedIncorrect. If the requirement is selected, all of the objects must be supported.
c) All of the objects must be supported if the requirement is supportedCorrect.
d) At least one of the objects must be supported if the requirement is supportedIncorrect. If the requirement is supported, all of the objects must be supported.
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NTCIP 1213 Dialogs
Learning Objective # 4
A Basic Dialog between the TMS and the ELMS
Request
Response
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NTCIP 1213 Dialogs
Learning Objective # 4
Dialog Example: Configuring a Schedule
Action
Day Plan
Time Base Schedule
Source: NTICP 1213
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NTCIP 1213 Dialogs
Learning Objective # 4
All Dialog Objects Are Listed in the RTM
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Summary of Learning Objective #4 Explaining Interoperability and the RTM
We explained source requirements and how they are selected in the RTM. We examined links to dialogs, objects, and block objects. We described how a specification is created to support the complete end-to-end example, from user need to dialog on the wire.We discussed how monitoring of ELMS is accomplished.
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Learning Objective # 5 – Examine the benefits of the SEP approach
Benefits in developing a test plan Benefits of testing using SEP Benefits to agencies Benefits to vendors
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Examine the benefits of the SEP approachThe Benefits in Developing a Test Plan
Verify that requirements are fulfilled Reduce the risk of misinterpretation between agency and manufacturers Reduce the risk of financial mismanagement Reduce the risk of perceived lack of oversight Ensure interoperability to allow system expansion
Learning Objective # 5
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Examine the benefits of the SEP approachThe Benefits of Testing Using SEP
Validation: Making sure a system, when placed in operation, will support agency needs
Verification: Making sure a design complies with requirements and that the systems (as proposed and delivered) comply with both design and requirements
Traceability: A tool to help determine if the agency’s requirements are fulfilled by the design and that implementation was done correctly
Used for unit, subsystem, and system testing
Learning Objective # 5
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Examine the benefits of the SEP approachThe Benefits of Testing Using SEP
Unit/Device Testing Focuses on comparing an implementation against the standards and specified options May be performed by inspecting the code to use “proven” software to send test messages to the device
Subsystem Testing Consists of connecting two or more devices together and exchanging data Assumes devices and components have passed a designed unit test plan
Learning Objective # 5
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Examine the benefits of the SEP approachThe Benefits of Testing Using SEP
System Testing Highest level of testing Performed after all lower level testing is successfully completed Performed in an operational environment Includes acceptance testing
Learning Objective # 5
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Examine the benefits of the SEP approachThe Benefits of Testing Using SEP
Learning Objective # 5
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Examine the benefits of the SEP approachThe Benefits of Testing Using SEP
Provides the framework and process to verify that the system meets the user needs Improves stakeholder participation Results in more adaptable, resilient systems Verifies functionality and fewer defects Results in higher level of reuse in future projects Results in better documentation
Learning Objective # 5
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Examine the benefits of the SEP approachThe Benefits to Agencies
Users including transportation and electric utility specification developers can use testing results to confirm which requirements have been delivered in a project specific implementation
The protocol implementer can use testing results to confirm conformance to NTCIP 1213
Learning Objective # 5
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Examine the benefits of the SEP approachThe Benefits to Vendors
The supplier can supply testing data as a detailed indication of the capabilities of the implementation
The user can use this vendor supplied test data, as a basis for checking interoperability with another implementation
Learning Objective # 5
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Summary of Learning Objective #5 Benefits of the SEP Approach
We discussed the importance of the SEP.
We examined the benefits in developing a test plan.
We reviewed the benefits to agencies including Transportation and electricity specification developers.
We reviewed the benefits to vendors.
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Learning Objective #6 – Extending the Standard
Conditions and context for extending the standard Specify requirements not covered by the standard
Adding missing requirements identified through best practices Emphasize user needs-requirements link
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Extending the StandardComplicates interoperability and interchangeability
Not achievable unless all design details are known Extensions are relatively custom solutions, resulting in:
Increased specification costs Increased development costs Increased testing costs Increased integration costs Longer deployment timeframe Increased maintenance costs
Learning Objective #6
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Extending the StandardExtensions should only be considered when:
NTCIP features are inadequate to meet need Benefits of extension outweigh added costs
Learning Objective #6
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Extending the StandardExtended equipment should be designed to:
Appropriately integrate with NTCIP-only deployments Minimize added complexity
Learning Objective #6
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Extending the Standard Using a Custom User Need
X.1 Custom NeedsX.1.1 Plan Selection Based on Astronomical Clock (Annex C)
A TMS operator needs the ELMS to switch luminaires, circuits and electrical services based on the sunrise and sunset time as calculated by day of year, and latitude/longitude.This feature allows ELMS to ensure these conditions are managed daily.
Learning Objective #6
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Extending the Standard Using a Custom User Need
X.2 RequirementsX.2.1 Configure Astronomical Control
The ELMS shall allow the TMS to configure schedule mode to enable astronomical control
X.2.2 Monitor Astronomical Control
The ELMS shall allow the TMS to monitor astronomical control.
Learning Objective #6
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Learning Objective #6
a) There is an unmet need that justifies the added costb) The existing system uses a non-standard methodc) You want to use your specification to favor a specific
vendord) When the standardized solution is overly complex for
your simple needs
Which of the following is the best reason to extend the NTCIP 1213 standard?
Answer Choices
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Learning Objective #6
Review of answersa) There is an unmet need that justifies the added cost
Correct. Sometimes you just have to accept the added cost.
b) The existing system uses a non-standard methodIncorrect. Doing this will prolong the expensive customized approach for another generation.
c) You want to use your specification to favor a specific vendor Incorrect. This can trap you into a proprietary solution.
d) When the standardized solution is overly complexIncorrect. Some NTCIP features are complex to allow flexibility, but costs of custom solutions far outweigh any costs due to added complexity.
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Summary of Learning Objective #6 Explain conditions and context for extending the Standard
We discussed specifying requirements that arethat are not included in the standard: By adding missing requirements identified through best practices By emphasizing the user need/requirements link
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What We Have Learned1) Components of the standards: User Needs,____________,
Dialogs, the _____and the RTM.
2) _______ and messages in the _____are communicated to the field device using ________.
3) The protocol implementer can use testing results to confirm ___________to NTCIP 1213 as a benefit to agencies.
4) The RTM traces requirement to a _______design solution, thereby providing _____________
Requirements
Dialogs
PRL
RTMSNMP
single
conformance
interoperability
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Resources Systems Engineering Handbook, Version 3.2, International Council on Systems Engineering, January 2010 Systems Engineering Guidebook for Intelligent Transportation Systems, Version 3.0, United States Department of Transportation, November 2009 The NTCIP Guide, Version 04, NTCIP 9001, 2009 Object Definitions for Electrical and Lighting Management Systems, Version 2.20b, NTCIP March 2011 A306b Participant Student Supplement
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