Statistical Process Statistical Process Control Control of Project Performance of Project Performance 1. D efine the w ork. 2. Schedule the w ork. 3.A llocate the B udgets 100 50 80 20 50 10 20 Funding R eserve Schedule R eserve BCW S Time C ost Walt Lipke Software Division Tinker AFB, OK SCEA 2002 June 11-14 Scottsdale, AZ
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Statistical Process Control of Project Performance Walt Lipke Software Division Tinker AFB, OK SCEA 2002 June 11-14 Scottsdale, AZ.
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Statistical Process ControlStatistical Process Controlof Project Performanceof Project Performance
1. Define the work.
2. Schedule the work.
3. Allocate the Budgets100
50
80
20
50
10
20
Funding Reserve
Sch
edu
le Reserve
BCWS
Time
Co
st
Walt LipkeSoftware DivisionTinker AFB, OK
SCEA 2002June 11-14Scottsdale, AZ
2
ObjectiveObjective
To discuss the application ofTo discuss the application ofSPC Control Charts to the SPC Control Charts to the
EVM indicators,SPI and CPIEVM indicators,SPI and CPI
EVM
CPI
SPI
ControlCharts
SPC
3
OverviewOverview
• Introduction• SPC applied to Software Development?• Review EVM & SPC• SPC with EVM – Does What?• Problems / Cause• Solution Criteria• Proposed Solutions• Testing / Results• Summary
4
IntroductionIntroduction• Software Division
– SEI CMM Level 2 (1993) – First in Air Force– SEI CMM Level 4 (1996) – First in Federal Service– ISO 9001 / TickIT (1998)– IEEE / SEI Software Process Achievement Award (1999)
• EVM Facilitated the Achievements
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Why SPC?Why SPC?
• SEI CMM Level 4 – Then & Now
• “Statistically Manage the Sub-process”
• CMM Evaluators “Show me the SPC Control Charts”
• Quality Control vs Performance Management
6
SPC ReviewSPC Review
• Several Methods Control Charts
• Control Charts Several Types
• Individuals and Moving Range
Average23 2 3
Process Behavior
AnomalousBehavior
AnomalousBehavior
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Control ChartControl Chart
1 2 3 4 5 6 20 21 22 23 24 25
3σ
3σ
xObservedValues
Anomalous(“signal”)
Observations – in sequence
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EVM ReviewEVM Review
Time
BCWS
ACWP
BCWP
$
Total Allocated Budget
Budget at Completion
Management Reserve
BCWS
BCWPSPI
ACWP
BCWPCPI
ProjectCompletion
Date
NegotiatedCompletion
Date
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SPC with EVM – Does What?SPC with EVM – Does What?
• Performance Prediction– Probability of Success– EAC & ECD – range