Lecture Note
Progress and Performance Measurement and Evaluation
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University:
California State University, Northridge -
Course:
MSE 402 | Engineering Project Management Academic year:
2024
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Views:
161
Pages:
40
Author:
niewszytez7o
Progress and Performance
Measurement and
Evaluation Where We Are Now
13–2 Structure of a Project Monitoring
Information System
• Creating a project monitoring system
involves determining:
–What data to collect
–How, when, and who will collect the data
–How to analyze the data
–How to report current progress to management
13–3 Project Monitoring Information System
• Information System Structure
–What data are collected?
• Current status of project (schedule and cost)
• Remaining cost to compete project
• Date that project will be complete
• Potential problems to be addressed now
• Out-of-control activities requiring intervention
• Cost and/or schedule overruns and the reasons for them
• Forecast of overruns at time of project completion
13–4 Project Monitoring System… (cont’d)
• Information System Structure (cont’d)
–Collecting data and analysis
• Who will collect project data?
• How will data be collected?
• When will the data be collected?
• Who will compile and analyze the data?
–Reports and reporting
• Who will receive the reports?
• How will the reports be transmitted?
• When will the reports be distributed?
13–5 Project Progress Report Format
• Progress since last report
• Current status of project
1. Schedule
2. Cost
3. Scope
• Cumulative trends
• Problems and issues since last report
1. Actions and resolution of earlier problems
2. New variances and problems identified
• Corrective action planned
13–6 The Project Control Process
• Control
– The process of comparing actual performance against plan to
identify deviations, evaluate courses of action, and take
appropriate corrective action.
• Project Control Steps
1.
2.
3.
4.
Setting a baseline plan.
Measuring progress and performance.
Comparing plan against actual.
Taking action.
• Tools
– Tracking and baseline Gantt charts
– Control charts
13–7 Baseline and Tracking Gantt Charts
FIGURE 13.1
13–8 Project Schedule Control Chart
FIGURE 13.2
13–9 Disparity Among Monitoring Systems
• Time-Phase Baseline Plan
–Corrects the failure of most monitoring systems to
connect a project’s actual performance to its schedule
and forecast budget.
• Systems that measure only cost variances do not identify
resource and project cost problems associated with falling
behind or progressing ahead of schedule.
• Earned Value Cost/Schedule System
–An integrated project management system based on
the earned value concept that uses a time-phased
budget baseline to compare actual and planned
schedule and costs.
13–10 Glossary of Terms
EV
Earned value for a task is simply the percent complete times its original budget. Stated differently,
EV is the percent of the original budget that has been earned by actual work completed.
PV
The planned time-phased baseline of the value of the work scheduled. An approved cost estimate
of the resources scheduled in a time-phased cumulative baseline [BCWS—budgeted cost of the
work scheduled].
AC
Actual cost of the work completed. The sum of the costs incurred in accomplishing work.
[ACWP—actual cost of the work performed].
CV
Cost variance is the difference between the earned value and the actual costs for the work
completed to date where CV = EV – AC.
SV
Schedule variance is the difference between the earned value and the baseline line to date where
SV = EV – PV.
BAC
Budgeted cost at completion. Total budgeted cost of the baseline or project cost accounts.
EAC
Estimated cost at completion.
ETC
Estimated cost to complete remaining work.
VAC
Cost variance at completion. VAC indicates expected actual over- or under-run cost at completion.
TABLE 13.1
13–11 Developing an Integrated Cost/Schedule System
1. Define the work using a WBS.
a. Scope
b. Work packages
c. Deliverables
d. Organization units
e. Resources
f. Budgets
2. Develop work and
resource schedules.
a. Schedule resources
to activities
3. Develop a time-phased
budget using work packages
included in an activity.
Accumulate budgets (PV).
4. At the work package level,
collect the actual costs for
the work performed (AC).
Multiply percent complete
times original budget (EV).`
5. Compute the schedule
variance (EV-PV) and the
cost variance (EV-AC).
b. Time-phase work packages
into a network
13–12 Project Management Information System Overview
FIGURE 13.3
13–13 Development of Project Baselines
• Purposes of a Baseline (PV)
–An anchor point for measuring performance
• A planned cost and expected schedule against
which actual cost and schedule are measured.
• A basis for cash flows and awarding progress payments.
• A summation of time-phased budgets (cost accounts as
summed work packages) along a project timeline.
• What Costs Are Included in Baselines?
–Labor, equipment, materials, project direct overhead
costs (DOC)
13–14 Development of Project Baselines (cont’d)
• Rules for Placing Costs in Baselines
–Costs are placed exactly as they are expected to be
“earned” in order to track them to their point of origin.
–Percent Complete Rule
• Costs are periodically assigned to a baseline as units of work
are completed over the duration of a work package.
13–15 Methods of Variance Analysis
• Comparing Earned Value
–With the expected schedule value.
–With the actual costs.
• Assessing Status of a Project
–Required data elements
• Data Budgeted cost of the work scheduled (PV)
• Budgeted cost of the work completed (EV)
• Actual cost of the work completed (AC)
–Calculate schedule and cost variances
• A positive variance indicates a desirable condition,
while a negative variance suggests problems or
changes that have taken place.
13–16 Methods of Variance Analysis
• Cost Variance (CV)
–Indicates if the work accomplished using labor
and materials costs more or less than was
planned at any point in the project.
• Schedule Variance (SV)
–Presents an overall assessment in dollar terms
of the progress of all work packages in the project
scheduled to date.
13–17 Cost/Schedule Graph
FIGURE 13.4
13–18 Earned-Value Review Exercise
FIGURE 13.5
13–19 Developing A Status Report:
A Hypothetical Example
• Assumptions
–Each cost account has only one work package, and
each cost account will be represented as an activity
on the network.
–The project network early start times will serve as
the basis for assigning the baseline values.
–From the moment work an activity begins, some
actual costs will be incurred each period until the
activity is completed.
13–20 Work Breakdown Structure with Cost Accounts
FIGURE 13.6
13–21 Digital Camera Prototype Project Baseline Gantt Chart
FIGURE 13.7
13–22 Digital Camera Prototype Project Baseline Budget ($000)
FIGURE 13.8
13–23 Digital Camera Prototype Status Reports: Periods 1–3
TABLE 13.2
13–24 Digital Camera Prototype Status Reports: Periods 4 & 5
TABLE 13.2 (cont’d)
13–25 Digital Camera Prototype Status Reports: Periods 6 & 7
TABLE 13.2 (cont’d)
13–26 Digital Camera Prototype Summary Graph ($000)
FIGURE 13.9
13–27 Digital Camera Project-Tracking Gantt Chart
Showing Status—Through Period 7
FIGURE 13.10
13–28 Project Rollup
End Period 7
($000)
FIGURE 13.11
13–29 Indexes to Monitor Progress
• Performance Indexes
–Cost Performance Index (CPI)
• Measures the cost efficiency of work accomplished to date.
• CPI = EV/AC
–Scheduling Performance Index (SPI)
• Measures scheduling efficiency
• SPI = EV/PV
–Percent Complete Indexes
• Indicates how much of the work accomplished represents of
the total budgeted (BAC) and actual (AC) dollars to date.
• PCIB = EV/BAC
• PCIC = AC/EAC
13–30 Interpretation of Indexes
Index
Cost (CPI)
Schedule (SPI)
>1.00
=1.00
<1.00
Under cost
On cost
Over cost
Ahead of schedule
On schedule
Behind schedule
TABLE 13.3
13–31 Indexes
Periods 1–7
FIGURE 13.12
13–32 Additional Earned Value Rules
• Rules applied to short-duration activities and/or
small-cost activities
–0/100 percent rule
• Assumes 100 % of budget credit is earned at once and only
when the work is completed.
–50/50 rule
• Allows for 50% of the value of the work package budget to
be earned when it is started and 50% to be earned when the
package is completed.
–Percent complete with weighted monitoring gates
• Uses subjective estimated percent complete in combination
with hard, tangible monitoring points.
13–33 Forecasting Final Project Cost
• Methods used to revise estimates of future
project costs:
–EACre
• Allows experts in the field to change original baseline
durations and costs because new information tells them
the original estimates are not accurate.
–EACf
• Uses actual costs-to-date plus an efficiency index to project
final costs in large projects where the original budget is
unreliable.
13–34 Forecasting Model: EACf
The equation for this forecasting model:
13–35 Monthly Status Report
EXHIBIT 13.1
13–36 Other Control Issues
Issues In Maintaining Control Of Projects
Scope Creep
Baseline Changes
Data Acquisition
Costs and Problems
13–37 Scope Changes to a Baseline
FIGURE 13.13
13–38 Conference Center WiFi Project
Communication Plan
FIGURE 13.14
13–39 Key Terms
Baseline budget
Control chart
Cost performance index (CPI)
Cost variance (CV)
Earned value (EV)
Estimated Cost at Completion—Forecasted (EACf)
Estimated Cost at Completion—Revised Estimates (EACre)
Percent complete index—budget costs (PCIB)
Percent complete index—actual costs (PCIC)
Schedule performance index (SPI)
Schedule variance (SV)
Scope creep
To complete performance index (TCPI)
Tracking Gantt chart
Variance at completion (VAC)
13–40
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