CAST HIGHLIGHT - Results - Calculation - FTE - An example of how FTE is Calculated and the survey questions which affect this

There is an application which has a total FTE of 0.45 FTE. Looking at the Maintenance Dashboard,  it can be seen that this is based on an effort of 0.5 FTE and 1.0k FTE/Day which is derived from survey questions. Looking at Highlight documentation can see that the Actual FTE is based on the following formula = (% of Development Effort spent on Maintenance) * (total FTE that worked on code). What survey questions affect this?

For this app, for the standard survey question "What percentage of the development effort has been spent on maintenance (O&M) in the last 12 months?" the answer received was "0.45". 

 

Details

Example 1:

The Calculation steps for recorded maintenance effort from the application is

- [Code Scan] 664,700 lines of code
- [Software Maintenance survey] Code Base change: 15%
- [Software Maintenance survey] Maintenance Effort: 100%
- [Business Impact survey] FTEs: 0.45
- [constant] Average working days per year: 220

664,700 * 15% * 100% = 99,705 lines of code being added/changed for maintenance purposes

In order to get the total LOC/FTE/day being maintained:
- 99,705 / 0.45 / 220 = 1,007 loc/FTE/day

 

Example 2:

The information from the application is:

 

- 115.9 K lines of code

- Code based change 30%

- Maintenance effort 50%

- FTEs 20

- Average working days per year 220 (constant)

 

You have a 34.8 K LOC change ( 115.9*0.3)

You have a effective FTE of 10 (50% of 20)

Since the number of lines of code modified are distributed between code maintained and new code based on the percentage of effort allocated to each type of development. 
 
The calculation is  34 800LOC * 50% / 10 ETP / 220 days/year which gives 7.9

 

Related Articles

CAST HIGHLIGHT - Result - Calculation - FTE - How is recommended effort calculated for software maintenance

 

Additional Resources

CAST Highlight Troubleshooting Guides

CAST Highlight Product Documentation

 

Zendesk Ticket Number 

26340

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