Entries by 'David Zubrow'

Quantifying Uncertainty in Early Lifecycle Cost Estimation (QUELCE): An Update

Measurement & Analysis , Software Cost Estimates 6 Comments »

By Dave Zubrow,
Chief Scientist
Software Engineering Process Management Program

Dave ZubrowBy law, major defense acquisition programs are now required to prepare cost estimates earlier in the acquisition lifecycle, including pre-Milestone A, well before concrete technical information is available on the program being developed. Estimates are therefore often based on a desired capability—or even on an abstract concept—rather than a concrete technical solution plan to achieve the desired capability. Hence the role and modeling of assumptions becomes more challenging.  This blog posting outlines a multi-year project on Quantifying Uncertainty in Early Lifecycle Cost Estimation (QUELCE) conducted by the SEI Software Engineering Measurement and Analysis (SEMA) team. QUELCE is a method for improving pre-Milestone A software cost estimates through research designed to improve judgment regarding uncertainty in key assumptions (which we term program change drivers), the relationships among the program change drivers, and their impact on cost.


High Maturity Software Engineering Measurement and Analysis

CMMI , Measurement & Analysis , Team Software Process (TSP) 2 Comments »

By Dave Zubrow, Manager
Software Engineering Measurement and Analysis Initiative


Dave ZubrowThe SEI has been actively engaged in defining and studying high maturity software engineering practices for several years.  Levels 4 and 5 of the CMMI (Capability Maturity Model Integration) are considered high maturity and are predominantly characterized by quantitative improvement. This blog posting briefly discusses high maturity and highlights several recent works in the area of high maturity measurement and analysis, motivated in part by a recent comment on a Jan. 30 post asking about the latest research in this area. I’ve also included links where the published research can be accessed on the SEI website.