Agile and Large Teams

965302002 楊尚樺

Outline

Introduction Definition of Size Small-Sized (or Typical) Agile Team Medium-Sized Agile Team Large-Sized Agile Team Conclusion Q&A

Introduction

Author: Scott Ambler http://www.ambysoft.com/

Definition of Size

Size is in the eye of the beholder A large project is 20 percent bigger

than any project you’ve successfully accomplished in the past. [Larry Constantine]

Definition of Size

In the eye of Ambler Small-sized project team

members < 15 Medium-sized project team

15 < members < 50 Large-sized project team

50 < members

Small-Sized (or Typical) Agile Team

Small and co-located Generalizing Specialists

http://www.agilemodeling.com/essays/generalizingSpecialists.htm

Collaborate closely Learn from others

Supplement: GM vs. Toyota

F. W. Taylor 大量生產

類似傳統軟工， big release Specialists

類似傳統軟工，角色分工清楚。 裝車門的只會裝車門 裝輪胎的只會裝輪胎

代表公司 GM Chrysler Ford

Supplement: GM vs. Toyota

Toyota Production System 小批量生產

類似 Agile ， small release 多能工

意思是有很多種能力的工人 類似 Agile ，角色較少，相互合作。

代表公司 Toyota

Small-Sized (or Typical) Agile Team

Team Coach Product Owner

The team

Developers

Working System

Supporting cast

Technical Experts Domain Experts Independent Testers

Part time

Full time

Product OwnerDevelopersTeam Coach

The team

Medium-Sized Agile Team

Agile DBA

Supporting cast

Technical Experts Domain Experts Independent Testers

Data modeling

Database regression testing

Continuous database integration

Database refactoring

Working System

Large-Sized Agile Team

Divide and Conquer Organize your large team into a

collections of small teams. How?

Organize you sub-team base on the architecture design.

Supplement:Conway’s Law Communication structure

of team organizations:

Architecture structure of system:

Sub Team A

Sub Team B

Sub Team C

Sub Team D

communicate with

communicate withcommunicate with

Subsystem A

Subsystem B

Subsystem C

Subsystem D

interface with

interface withinterface with

Sub team

Product OwnerTeam Coach

Agile DBA Developers

Supporting cast

Technical Experts Domain Experts Independent Testers

Large-Sized Agile Team

Architecture Owner

Coordinators

Product Ownership Team Architecture Ownership Team

Sub team

Project Management Team

Working Sub System

Working System

Create Initial Architecture

Resolve Interface Issue

Define Requirement

Divvy RequirementManage Project

Monitor Project

Conclusion

There is very little difference in the day-to-day activities of developers.

The developers are insulated from the complexities of large teams by activities of coordinators.

Sustainable Pace

Thank you

Q&A