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NPV Scheduler is the most complete and versatile tool for strategic open pit mineplanning on the market. Functionality

spans everything from preliminarymodeling through to building detailedlife-of-mine plans with practicalpush-backs and scheduling.

NPV SchedulerThe complete strategic mine planning system

cae.com/min

Geological ModelImport a geological block model with grade, lithology

topography, surfaces and mining boundaries. Digitize

plan data. Model may also contain recovery, cost and

slope information.

Economic ModelInput commodity prices, mining costs, processing

costs and recoveries to create a three-dimensional

economic model with “intrinsic block values”.

Nested PitsGenerate a set of nested Lerchs-Grossmann (LG) pit

shells that represent varying economic parameters

and generate an Ultimate Pit Optimal Extraction

Sequence (OES).

Practical PushbacksUse the LG shells, Optimal Extraction Sequence and

pushback targets to generate practical pushback

shapes that respect good mine design practice.

Optimized ScheduleSchedule pushbacks according to production targets

and mining constraints for maximum optimization.

Refine the schedule with blending and cut-off grade

optimization. Include haulage truck hours as an

optimization target.

Methodology 

• Optimized strategic mine plan with design and

schedule contained in one system

• Ultimate pits are optimized for maximum cash flow

(base and precious metals) or maximum reserve

life (industrial minerals). Pits are optimally sequenced

to maximize NPV or achieve material blend

• Fast, practical, mineable pushback generation

• Sophisticated scheduling, blending, stockpiling, grade

optimization, process optimization, production

targeting and haulage optimization

• Easy-to-use methodology with multiple layers of

sophistication, from quick studies to detailed mine

plans

From Geological

Model to Mine Plan

Benefits

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© 2012 CAE Mining

Inside NPV Scheduler 

First Pushback ? Last Pushback ?

Determining Pushback

ShapesPushbacks are based on LG shells, but

practical mining requires careful formation of the

final pushback shapes. NPV Scheduler creates

the pushbacks using LG shells and the Ultimate

Pit OES, but it also optimizes the push back

shapes for practical mining, while retaining the

maximum possible NPV.

 Visualization, Animationand ReportingNPV Scheduler has a wide variety of reporting

and visualization options, from full reports with

customizable content to 3D rendered life of mine

animations.

Material Allocation

OptimizerMAO examines the processing of each block

(leach pad, mill, stockpile, waste etc.) and

reallocates it to a new method based on overalleconomic value. MAO optimizes stockpiling

and multiple blended products (e.g. iron ore &

industrial minerals) where production targets and

 varying product specifications can be blended

from different inputs.

Mine Flow OptimizerMFO increases NPV by optimizing cut-off grades.

It adjusts the schedule to create more value by

mining a higher grade of ore earlier when that

outweighs the cost of wasting or stockpiling

lower grade ore.

Geo-Risk AssessmentGRA provides a mechanism for understanding

the risk associated with the uncertainty of gradedistribution in the resource model. It does this

by considering conditionally-simulated models in

the strategic planning process. GRA generates

a set of risk-rated pits which can be used to

limit the impact of grade uncertainty on planning

outcomes.

Capital CostsNPV Scheduler can model multiple types of

capital costs such as pushback start-up costs,

costs that occur at fixed times or are associated

 with the removal of material within specifiedboundaries.

Haulage OptimizationIn order to produce a schedule with practical

haulage fleet requirements NPV Scheduler

allows the inclusion of haulage truck hours as

an integral optimization target. The scheduler

 will al locate blocks taking into account their

transport requirements as well as their material

types and values. This is in contrast to other

systems that typically provide tools to analyze thehaulage requirements after a schedule has been

developed.

AUSTRALIA

Perth

Level 3, 41-43 Ord StreetWest Perth WA 6005

 Tel +61 8 6462 0900

Brisbane

Level 15, 120 Edward StreetBrisbane, Queensland, 4000

 Tel +61 7 3248 0000

BRAZIL

Belo Horizonte

Alameda da Serra, 360 – 7o anVila de Serra – Nova Lima – MG

34000-000

 Tel +55 31 3264 9377

CANADAMontreal

3200 Guenette

Saint-Laurent, QuebecH4S 2G5 Canada

 Tel +1 514 341 2000 ext. 2404

Sudbury

866 Newgate Avenue, Unit 2

Sudbury, Ontario P3A 5J9 Toll-free: 1 800 240 6941

 Tel +1 705 688 0101

CHILE

SantiagoSanta Magdalena, 75

Oficina 903, Providencia

Santiago 751-0038

 Tel +56 2 2334 5952

COLOMBIACalle 29 N° 41 - 105 Of. 1206

Edificio Soho

Medellín, Antioquia Tel +57 - 4 - 403 17 75

INDIA

New Delhi

601, Elegance TowerJasola District Centre

New Delhi - 110 025

India Tel +91 11 41290000

KAZAKHSTANKaraganda

201, 2 Lenin Street

100012, KaragandaRepublic of Kazakhstan

 Tel +7 7212 425138

MEXICO

Callejón del Capulín #101, escon Avenida Torreón, centro

Zacatecas, Zac.

C.P. 98000 Tel +52 492 22 122

PERULima

Av. Manuel Olguín, 335 Oficin Torre Link Tower

Surco, Lima - Peru

 Tel +51 1 434 2727

SOUTH AFRICA

Johannesburg9 Fricker Road

Illovo Boulevard, Illovo

Johannesburg, 2196Republic of South Africa

 Tel +27 11 772 7960

UNITED KINGDOM

WellsUnit A, Underwood Business

Wookey Hole Road,

Wells, Somerset BA5 1AFUnited Kingdom

 Tel +44 1749 683 350

UNITED STATES OF AMERICA

Denver

10901 W. Toller Drive #205Littleton, CO 80127

United States

 Tel +1 303 985 7713

caemining@cae.com

Global offices