Chapter 4
Better Project Management Leads to More Reliable Cost and Schedule Performance
Even more important than improving Schedule Performance Index (SPI) and Cost Performance Index (CPI) ratios, companies with higher project management maturity (PMM) deliver projects with more predictable schedule and cost results. As companies improve their PMM, their individual SPI results tend to deviate less from the overall SPI average; see Figure 4-1.
As also seen with these data, CPI standard deviation also decreases as project management skills improve. Companies with high PMM are less likely to have projects where the budgets escalate out of control. Budget accuracy reduces fiduciary risk. For capital-intensive projects, this result can lead to ...
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