statisticalprocesscontrolofprojectperformance(ppt32)全英文-品質(zhì)管理-資料下載頁
2025-08-08 21:50本頁面
【導讀】1.Definethework.2.Schedulethework.Introduction. ReviewEVM&SPC. SPCwithEVM–DoesWhat?Problems/Cause. SolutionCriteria. ProposedSolutions. Testing/Results. Summary. SoftwareDivision. WhySPC?SEICMMLevel4–Then&Now. CMMEvaluators. Average???2??3????2??3?3σ?3σ?x. BCWSBCWPSPI?ACWPBCWPCPI?SPCwithEVM–DoesWhat?ProjectPlanning. ProcessImprovement. 3σ?3σ?2.9813σ??-0.6723σ??0.609σ?1.154SPI???1.9143σ??0.0893σ??0.304σ?1.8593σ??0.1793σ??0.277σ?1.029SPI???1.9143σ??0.0893σ??0.304σ?3σ?1.8σ?0.6σ?0.6σ?1.8σ?3σ?3σ?1.8σ?0.6σ?0.6σ?1.8σ?3σ?1.9143σ??0.0893σ??0.304σ?2.9813σ??-0.6723σ??0.609σ?1.154SPI???
【正文】 0 . 5 5 1)P(3 . 0 6 622????Count Legend: Solid Line ( ) actual Dashed line ( ) expected 3σ? ? ? ? ? 3σ?ln CPI1 Histogram 27 Testing Summary Test Raw Transformation Logarithm 1. ?PI?1 = ?PI1? No Yes Yes 2. PI Signals = PI1 Signals No Yes Yes 3. PI Sigma = PI1 Sigma No Yes Yes 4. Histograms ~ Normal Distribution Very Unlikely Unlikely Likely 28 Sensitivity Analysis 00 . 0 20 . 0 40 . 0 60 . 0 80 . 10 . 1 20 0 . 1 0 . 2 0 . 3 0 . 4 0 . 5 0 . 6 0 . 7?SPIs? (,) ?SPI? (,) ??SPIs?u (,) ??SPI?u (,) ?ln SPIs?u (,) ?ln SPI?u (,) ???PI? PIcum ? Note: 1. Subscript s indicates the signal is removed from the calculations. 2. Subscript u indicates the average value is untransformed from the average value determined from the SPC analysis 29 Summary ? SPC application to Software Development ? SPC applied to CPI amp。 SPI – Project Execution – Project Planning – Process Improvement ? Problems – Data Representation – SPC Results 30 Summary ? Solutions – Data Transform – Natural logarithm ? Criteria – Results independent from data representation – Results derived from Normal Distribution ? Testing/Results – Data Transform – Good – Natural Logarithm Better ?31 Final Remarks ? Equivalent to CPI and SPI – CV% = 1 – CPI1 – SV% = SPI –1 ? Distribution is skewed ? Data transformation is needed Managing to CV% and SV% 32 Final Remarks ? SPC – Better Management Decisions ? Weekly EV – More Management Decisions ? Weekly EV w/o SPC – Process Tampering ? Try SPC – It’s Not Difficult Weekly EV vs Monthly SP
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