Cost Management

Cost Management Processes
– Estimate costs (PLANNING)
– Determine the budget (PLANNING)
– Control costs (M&C)
Cost estimating and cost budgeting
On smaller scope projects, cost estimating and cost budgeting are so tightly linked that they can be viewed as a single process that can be performed by a single person over a relatively short period of time
When is the ability to influence cost the greatest?
In the early stages of the project

This is why early scope definition is so critical

Control Account
On some large projects it might be more practical to estimate and control costs at a HIGHER LEVEL than the individual activities – this is CONTROL ACCOUNT

Estimating and controlling costs at a level higher than the work package level in the WBS

Cost Management Plan

Created with the rest of the mgmt plans in DEVELOP PROJECT MGMT PLAN process in INTEGRATION MGMT

May include the following:
– Specifications for how estimates should be stated
– Level of accuracy needed for estimates
– Reporting formats to be used
– Rules for measuring cost performance
– Whether costs will include both direct costs (those directly attributable to the project) and indirect costs (e.g. overhead)
– Establishment of a cost baseline for measuing against as part of project M&C
– Control thresholds
– Cost change control procedures

Cost thresholds
The amount of variation allowed before you need to take action

Part of the cost mgmt plan and an example of how PMs think in advance about how they will manage costs

Life Cycle Costing
Looking at the cost of the whole life of the product, not just the cost of the project

Ex: Not wise to design the product so the project costs are low but the maintenance costs are higher than the project cost savings

Value Analysis
aka Value Engineering

Finding a less costly way to do the same work (e.g. How can we decrease cost on the project while maintaining the same scope?)

– Systematically identify all the required project functions, assign values to these functions and provide functions at teh lowest overall cost w/o loss of performance

Cost Risk
Involves risk, procuement and cost managment – crosses several knowledge areas
7.1 Estimate Costs
Process Group?
Knowledge Area?
Inputs (6)?
T&T (9)?
Outputs (3)?
Process Group: PLANNING

Knowledge Area: COST MGMT

.1 Scope baseline
.2 Project schedule
.3 Human resource plan
.4 Risk register
.5 Enterprise environmental factors
.6 Organizational process assets

.1 Expert judgment
.2 Analogous estimating
.3 Parametric estimating
.4 Bottom-up estimating
.5 Three-point estimating
.6 Reserve analysis
.7 Cost of quality
.8 Project mgmt estimating software
.9 Vendor bid analysis

.1 Activity cost estimates
.2 Basis of estimates
.3 Project document updates

Coming up w/ cost estimates for each activity
– Will be combined into one time-phased spending plan during DETERMINE BUDGET
Which costs should be estimated?
Costs involved in all the efforts needed to complete the project:
– Costs of quality efforts
– Costs of risk efforts
– Costs of the PM’s time
– Costs of the PM activities
– Costs directly associated w/ the project, including labor, materials, training for the project, computers, etc.
– Office expenses for physical office spaces used directly for the project
– Profit, when applicable
– Overhead costs, such as mgmt salaries and general office supplies
Fixed vs. Variable Costs
Variable = costs change w/ the amount of production or the amount of work (e.g. cost of material, supplies, wages)

Fixed = costs do NOT change as production changes (e.g. cost of set-up, rent, etc.)

Direct vs. Indirect Costs
Direct = costs directly attributable to the work on the project (e.g. team travel, team wages, recognition, cost of materials used on the project)

Indirect = Overhead items or costs incurred for the benefit of more than one project (e.g. taxes, fringe benefits, janitorial services)

Scope Baseline
Provides the details of WHAT you are estimating
– what is in scope
– what constraints have been put on the project

Scope baseline = scope statement + WBS + WBS dictionary

Project Schedule
Schedule contains the activities, the resources assigned to complete the work and when the work will occur

You need a schedule before you can come up w/ a budget:
– The timing of whenyou buy something affects its cost
– You need to develop a time-phased spending plan to control project expenditure so you know how much money will be spent during specific periods of time

Human Resource Plan
Consider reward systems (increase productivity and ultimately save money) and labor rates
Risk Register
Risk mgmt will save time and oney, but there are costs associated w/ the efforts to control risks
How is estimating done?
Same techniques described in the Time Mgmt chapter
– One-point estimating
– Analogous estimating
– Parametric estimating
– Three-point estimating (PERT)

– Creating detailed estimates for each activity or work package
– Estimates are rolled up into CONTROL ACCOUNTS and finally an overall project estimate
– REQUIRES an accurate WBS

Reserve Analysis
ID which activities have significant risks and determining how much tiem and money to set aside to account for the risks if they occur

Contingency reserves > known risks

Management reserves > accommodate unknown risks or unidentified risks

Cost of Quality
Cost of work added to the project to accommodate quality efforts
Vendor Bid Analysis
Cost estimating may include analysis of what the project should cost, based on the responsive bids from qualified vendors
Accuracy of Estimates
Estimates made early in the project will be less accurate than those made later, when more is known about the project

Estimates should be in a range

Estimate Ranges
– Rough Order of Magnitude (ROM) estimate
– Budget estimate
– Definitive estimate
Rough Order of Magnitude (ROM) estimate
– Usually made during project INITIATING
– Typical range for ROM estimates is + / – 50 percent from actual

Budget estimate
– Usually made during project PLANNING
– Typical range of -10 to +25 percent from actual

Definitive estimate
– More refined estimate as the project progresses
– Typical range or + / – 10 percent

Activity Cost Estimates
Quantitative assessment of the probable costs required to complete project work
Basis for Estimates
Amount and type of add’l details supporting the cost estimate

Supporting detail:
– Basis of the estimate (i.e. how it was developed)
– Assumptions made
– Known constraints
– Range of possible estimates
– Confidence level in final estimate

7.2 Determine Budget
Process Group?
Knowledge Area?
Inputs (7)?
T&T (5)?
Outputs (3)?
Process Group: PLANNING

Knowledge Area: COST MGMT

.1 Activity cost estimates
.2 Basis of estimates
.3 Scope baseline
.4 Project schedule
.5 Resource calendars
.6 Contracts
.7 Organizational process assets

.1 Cost aggregation
.2 Reserve analysis
.3 Expert judgment
.4 Historical relationships
.5 Funding limit reconciliation

.1 Cost performance baseline
.2 Project funding requirements
.3 Project document updates

Objective of Determine Budget
PM calculates teh total cost of the project in order to determine the amount of funds the organization needs to have available for the project

Meeting the cost baseline will be the measure of project success

How do RESERVES fit into the COST BASELINE and the COST BUDGET?

Reserve Analysis

In estimating the total cost of a project, the PM must perform risk mgmt activities and include RESERVES in the estimate

2 types of reserves:
– Contingency = Known risks identified during risk reponse planning
– Management = Add’l funds set aside to cover unforeseen risks or changes to the project

The COST BASELINE includes CONTINGENCY RESERVES and represents the funds the PM has aurhtority to manage and control


Cost Aggregation
Cost Aggregation
To create a budget
– activity costs are rolled up to work package costs
– work package costs are rolled up to control account costs
– control account costs are rolled up to project costs
Funding Limit Reconciliation
Expenditure of funds should be reconciled w/ any funding limits on the commitment of funds for the project – a variance b/w FUNDING LIMITS and the PLANNED EXPENDITURE will sometimes necessitate the rescheduling of work to level out the rate of expenditures

Check CASH FLOW (part of funding limit reconciliation)
– funding may not be available when it is needed on the project, causing changes to other parts of the project iterations of the project docs or PM plan
– the cost baseline, therefore, is time-phased and may be shown as an S-curve

Cost Peformance Baseline
An authorized time-phased budget at completion (BAC) used to measure, monitor and control overall cost performance on the budget

Developed as a summation of the APPROVED BUDGETS BY TIME PERIOD and is typically displayed as an S-CURVE

Project Funding Requirements
Project Funding Requirements
Total funding requirements and periodid funding requirements (e.g. quarterly, monthly) are derived from the cost baseline

Funding often occurs in incremental amounts that are not continuous – appear as steps

7.3 Control Costs
Process Group?
Knowledge Area?
Inputs (4)?
T&T (6)?
Outputs (6)?
Process Group: PLANNING

Knowledge Area: M&C

.1 Project management plan
.2 Project funding requirements
.3 Work performance information
.4 Organizational process assets

.1 Earned Value Measurement (EVM)
.2 Forecasting
.3 To-complete performance index
.4 Performance reviews
.5 Variance analysis
.6 Project management software

.1 Work performance measurements
.2 Budget forecasts
.3 Organizational process assets
.4 Change requests
.5 Project management plan updates
.6 Project document updates

Progress Reporting
– % complete
– 50/50 rule
– 20/80 rule
– 0/100 rule
On projects where work is not objectively measured, the estimate team members provide re: percent complete is simply a guess (and does NOt provide a reaslistic estimate of the project’s progress)

There are alternatives to asking for % complete when using a properly broken down WBS:
– 50/50 rule = an activity is considered complete when it begins and gets credit for the last 50 percent only when it is complete
– 20/80 rule = an activity is considered complete when it begins and gets credit for the last 80 percent only when it is completed
– 0/100 rule = an activity does not get credit for partial completion; it only gets credit for full completion

Earned Value Measurement (EVM)
Method used to measure project performance against the SCOPE, SCHEDULE and COST BASELINES (aka the PERFORMANCE BASELINE)

The measurements resulting from an EVM analysis indicate whether there are any potential deviations from teh scope, schedule or cost baselines

EVM is BETTER than simply comparing planned to actual results:
– Integrates cost, time and work done (or scope)

PV = Planned Value

As of today, what is the value of the WORK PLANNED TO BE DONE?

EV = Earned Value

As of today, what is the estimated value of the WORK ACTUALLY ACCOMPLISHED?

AC = Actual Cost (total cost)

As of today, what is the ACTUAL COST INCURRED for the WORK ACCOMPLISHED?

BAC = Budget at Completion (the budget)

How much did we BUDGET for the TOTAL project effort?

EAC = Estimate at Completion

What do we currently expect the TOTAL project to cost (a forecast)?

ETC = Estimate to Complete

From this point forward, how much MORE do we expect it to cost to finish the project (a forecast)?

VAC = Variance at Completion

As of today, how much over or under budget do we expect to be at the end of the project?

(formula & interpretation)
CV = Cost Variance

Formula: EV – AC

– NEGATIVE is over budget
– POSTIIVE is under budget

(formula & interpretation)
SV = Schedule Variance

Formula: EV – PV

– NEGATIVE is behind schedule
– POSITIVE is ahead of schedule

(formula & interpretation)
CPI = Cost Performance Index

Formula: EV / AC

– We are getting $____ worth or work out of every $1 spent
– Fund ARE or ARE NOT being used efficiently

(formula & interpretation)
SPI = Schedule Performance Index

Formula: EV / PV

– We are (only) progressing at ____ % of the rate originally planned

(multiple formulas & interpretation)
(multiple formulas & interpretation)
EAC = Estimate at Completion

Note: There are many ways to calculate EAC, depending upon the assumptions made. But the PURPOSE is to create FORECASTS base on past performance on the project

– As of now, how much do we expect the total project to cost?

TCPI = To Complete Performance Index

Formula: (BAC – EV) / (BAC – AC)

– Divides the remaining work to be done by the money remaining to do it
– Answers the question “In order to stay within budget, what rate must we meet for the remaining work?”

ETC = Estimate to Complete

– EAC – AC (How much more will the project cost?)
– Reestimate (reestimate the reamining work from the bottom-up)

VAC = Variance at Completion

Formula: BAC – EAC

– How much over or under budget will we be at the end of the project?

BOTH forecast future performance based on what actually occurred on the proejct, taking into account any variances from the plan the project has already experienced

ETC – estimate of HOW MUCH MORE the REMAINING part of the project will cost to complete

EAC – what the TOTAL PROJECT COST is forecasetd to be

**Understand and memorize the following related to EVM formulas
– EV comes first in every formula
– If it is a VARIANCE, the formula is EV minus something
– If it is an INDEX, the formula is EV dividied by something
– If the formula relates to COST, use AC
– If the formula relates to SCHEDULE, use PV
– For VARIANCE INTERPRETATION, negative is bad, positive is good
– For INDICES INPERPREATION, great than one is good, less than one is bad
What is a formula for estimate at completion (EAC)?
BAC / Cumulative CPI
What estimating method would use optimistic time estimates?
Three-point estimate
“How much work should be done” has what earned value name?
Planned value
What is the critical path?
The longest duration path in the network; the shortest time to complete the project
The types and quantities of resources required are calculated in what part of time mgmt?
Estimate activity resources
What does the schedule variance tell you?
How far behind or ahead of schedule you are
What schedule network analysis technique involves crashing?
Schedule compression
What does a finish-to-start relationship mean?
One activity must finish before the next can start
What does the estimate at completion tell you?
What we expect the total project to cost
Why would you crash a project?
To shorten the project duration
The “what-if” scenario method of schedule network analysis primarily makes use of what technique?
Monte Carlo analysis
What are sunk costs?
Expended costs
What does a milestone chart show?
Dates of significant events on the project
What is the duration of a milestone?
What is analogous estimating?
Top-down estimating
What are fixed costs?
Costs that do not change with project activity
What are direct costs?
Costs incurred directly by the project
What is the earned value name for “how much you have spent to date?”
Actual cost
What is value analysis?
Finding a less costly way to complete the work w/o affecting quality
What is a management reserve?
An amount of time or money set aside to uncover unforeseen risks
What is the cost variance formula?
Cost risk is greater for the buyer in what type of contract?
Cost reimburseable
What schedule network analysis technique uses buffers?
Critical chain method
What does present value mean?
The value today of future cash flows
What is the formula for total float?



This is the amount of time an activity can be delayed w/o delaying the project

Why would a project manager want to use resource leveling?
The smooth the peaks and valleys of monthly resource usage consumed by the project
What does a benefit cost ratio of .25 mean?
Benefits are 2.5 times the costs
A critical path activity will generally have how much float?
What is parametric estimating?
Using mathematical relationships found in historical info to create estimates (e.g. dollars per foot of material)
What is the range of accuracy with a definitive estimate?
+ / – 10 percent

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