Original Post Date: Wednesday, October 6, 2010

Over the past several weeks several users have inquired about the best way to model legacy software that is being modified when estimating software costs. The software component within the TruePlanning Software model has an input parameter call “adapted Code Size.” This input parameter accounts for existing or legacy software that will be modified or changed to meet a new requirement. Tied with the size input parameter is Percent Design/Code/Test adapted. Although the model will calculate a percentage for each input, I would recommend that user’s analyze the calculate values and override the calculation where required. The percentage for each parameter is to reflect the amount of modification being accomplished. For example, calculated values below five percent or above forty percent are probably unrealistic. 

Values below five percent reflect one single function being modified, which is normally not the case. Values above forty percent generally result in the entire software package being re-developed. Hopefully this will clear up this software input parameter. If you have further questions, please email me at james.otte@pricesystems.com

Jim Otte
Solutions Architect, PRICE Systems