Effort Needed for Product Enhancements

Type: Rules

Gist

Calculate Effort from # of Function Points, for Enhancements

Rules and Notes

R1: The Capers Jones Formula for Effort E of new Products (in person months):

(1)
\begin{align} E = \frac{No. of Adjusted Function Points^{1.4}}{150} \end{align}

R2: Enhancements of products cannot be calculated with the same formula, as you need to take into account that you add complexity to an existing product.

R3: Formula for the needed EnhancementEffort EE for an Enhancement of y function points to a a base product of x function points:

(2)
\begin{equation} EE = E(x+y) - E(x) \end{equation}

EE = E(x+y) - E(x)

Note: Obviously you need to know y and x. The greater x is, the more significant is the difference between E and EE.

Costs, Savings

What does it take to implement those rules? What does it give?

Side effects

Is there anything that happend or will happen as one implements the rules? This relates to both wanted and unwanted effects ('unwanted' does not imply 'negative').

Related Pages

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