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Question:
Published on: 21 November, 2024

What are the propositions of Putnam’s model?

Answer:

Putnam’s model:

The Putnam model is an empirical software effort estimation model. Putnam used his observations about productivity levels to derive the software equation:

(B1/3.Size)/Productivity=Effort1/3. Time4/3

where:

  • Size is the product size (whatever size estimate is used by your organization is appropriate). Putnam uses ESLOC (Effective Source Lines of Code) throughout his books.
  • B is a scaling factor and is a function of the project size.
  • Productivity is the Process Productivity, the ability of a particular software organization to produce software of a given size at a particular defect rate.
  • Effort is the total effort applied to the project in person-years.
  • Time is the total schedule of the project in years.

In practical use, when making an estimate for a software task the software equation is solved for effort:

Effort=[Size/(Productivity.Time4/3)]3.B

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Mobile computing C Programming and Practices Software Engineering Compiler Design Computer Graphics and Multimedia Data Structures & Algorithm
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