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Putnam Software Model

Software Lifecycle Model (SLIM), or Software Production Equation, developed by Larry Putnam Sr. and embodied in the SLIM-Suite of applications, that models the nonlinear behavior of software development projects by relating software Size (Scope), Process Productivity, Time, and Effort.

Long Term Trends from 40 Years of Completed Software Project Data

by Katie Costantini (August 2019)
Leveraging data from QSM's Industry Database of 13,000+ completed software projects, Katie Costantini takes a high-level look at software schedules, effort/cost, productivity, size, and reliability metrics from 1980 to 2019.
Long Term Trends from 40 Years of Completed Software Project Data
Software Lifecycle Model (SLIM), or Software Production Equation, developed by Larry Putnam Sr. and embodied in the SLIM-Suite of applications, that models the nonlinear behavior of software development projects by relating software Size (Scope), Process Productivity, Time, and Effort.