User:Chrislk02/sandbox3

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In the study of software project scheduling, the Putnam-Norden-Rayleigh Curve, also known as the PNR Curve, is a graphical curve derived from a mathematical equation that indicated the relationship between applied effor and delivery time in relation to a software project. [1]

[edit] Equation

E_a=m \left ( \frac{{t_d}^4}{{t_a}^4}\right )

Where

  • Ea=Effort in person months
  • td=The nominal delivery time for the schedule
  • ta=Actual delivery time desired

[edit] References

  1. ^ Pressman, Roger S. [1982] (2005). Software Engineering - A Practitioner's Approach, 6th, Newyork, NY: McGraw-Hill, 678-679. ISBN 0-07-285318-2. 
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