Created by James Hurrell on Apr 16, 2021

Change the Computed FP

By default, CAST will use internal algorithms to define how the Function Point size of a specific object is computed. As discussed in Change the Computed Type, the method of computing the Function Points size is determined by which category the object falls into.

You will see how CAST computed the Function Point size of each individual object in the Data Functions/Transactional Functions nodes (part of the AFP Calibration node - Right hand panel), under the Computed FP column:

If you want to change the Function Point of a specific object:

  1. Move to the AFP Calibration node - Right hand panel to begin calibration
  2. Choose either the Data Functions or Transactional Functions sub node
  3. Double click the blank field under the New FP column.
  4. Enter a new value as required:

  5. The Status column will contain a * to indicate that a modification has been made (see Data Functions/Transactional Functions nodes for more information about the column headings).
  6. Click File > Save (or the button located on the Toolbar). This will save the new value in the CAST Analysis Service.
  7. Next time you use the Calibrate option or generate a snapshot in the CAST Management Studio, the new value will be used and the Function Point size of the object may change as a result.
Computation of ILF/EIF OMG-compliant Automated Function Points

The ILF OMG-compliant Automated Function Points is computed as follows:

  1 to 19 DET 20 to 50 DET 51 or more DET
0 or 1 RET Low = 7 FP Low = 7 FP Average = 10 FP
2 - 5 RET Low = 7 FP Average = 10 FP High = 15 FP
6 or more RET Average = 10 FP High = 15 FP High = 15 FP

The EIF OMG-compliant Automated Function Points is computed as follows:

  1 to 19 DET 20 to 50 DET 51 or more DET
0 or 1 RET Low = 5 FP Low = 5 FP Average = 7 FP
2 - 5 RET Low = 5 FP Average = 7 FP High = 10 FP
6 or more RET Average = 7 FP High = 10 FP High = 10 FP

Please see doc.castsoftware.com for more information about the above computation, specifically the topic entitled "CAST OMG-compliant Automated Function Points".

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