IWSM Presentation

1. Frank Vogelezang
Jelle de Vries
The added value of
Enhancement Function Points
@PabloSoneira

2. EFPA
ADDED VALUE
LANDSCAPE
RESULTS
LUNCH
The journey to the lunch break
With a little twist of how the Dutch deal with water

3. 3
Enhancement FPA established 1998
Fighting windmills or future technology

4. Enhancement FPA standardized
The size of enhancement as standardized by Nesma & IFPUG
Enhancement = ADD + CHGA + DEL
where
ADD = Size of added functionality
CHGA = Size of changed functionality after enhancement
DEL = Size of deleted functionality
4

5. Enhancement FPA established 1998
The size of enhancement
EFP = Σ (FPBASE * I)
introducing
I, the Impact Factor
5

6. I, the Impact Factor
Data Functions
Transactional Functions
6

7. There is enough evidence of use, but does it work?
7
Adam Savage Jamie Hyneman

8. EFPA
ADDED VALUE
LANDSCAPE
RESULTS
LUNCH
Enriching software estimation
Estimating new software development and enhancement with a single measure

9. 9
Adding 20 km2
to the 100 km2 of existing harbour area

10. Added Value
10
Especially increased value of a product by special marketing,
manufacturing, or processing
Adapted from Merriam Webster’s dictionary

11. AddedValue ofEnhancementFPA
We consider Enhancement FPA to have Added Value, when:
 The correlation between size and effort is improved,
compared to standard FPA
 Estimation predictability is improved,
compared to standard FPA
 One Product Delivery Rate can be used,
for both new development and enhancement
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12. EFPA
ADDED VALUE
LANDSCAPE
RESULTS
LUNCH
Application Portfolio Management
Transforming an outsourced application landscape

13. 13
Changing the landscape

14. Evaluation Environment
Initial application landscape (2008) After release 9.1 (2013)
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Office automation Primary process Legislative knowledge
Office automation Primary process Legislative knowledge
1284 FP 3544 FP

15. EFPA
ADDED VALUE
LANDSCAPE
RESULTS
LUNCH
The added value of Enhancement FPA
Is this “experimental method” living up to the promises?

16. 16
A third of the Netherlands
is less than 300 years old

17. The data set of 25 releases 17
Release 6.6 discarded
exceeded 3σ for build and test
24 releases used for analysis,
just a large enough sample:

18. Correlation of Size and Effort
Standard FPA Enhancement FPA
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19. Estimation predictability
Standard FPA Enhancement FPA
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20. One size fits all (build)
Sample split between:
- Enhancements (20)
- New development (4)
and compared to:
- Standard FPA
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21. One size fits all (test)
Sample split between:
- Enhancements (20)
- New development (4)
and compared to:
- Standard FPA
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22. Enhancement FPA, a myth?
 Better correlation between size and effort
 Estimation predictabiliy is improved
 One size fits all
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23. EFPA
ADDED VALUE
LANDSCAPE
RESULTS
LUNCH
Final destination
Room for discussion or time for lunch

24. 24

25. frank.vogelezang@ordina.nl
25
WatKostIT.blogspot.nl
ThePriceofIT.blogspot.com
@FrankVogelezang
FrankVogelezang
nl.linkedin.com/in/frankvogelezang

26. 26
www.ordina.nl