Estimating project work (Ana)

Question 1

Problem with software projects?

Answer 1

1. over budget
2. over time
3. not meeting requirements
   2.

Question 2

estimate?

Answer 2

guess, forecast, calculation of the most likely effort/money needed to complete a project, based on information

Question 3

estimation approaches?

Answer 3

Top down

Bottom-up

Question 4

Alternative terminology?

Answer 4

1. Algoritmic models

2. expert judgement

Question 5

Algoritmic models?

Answer 5

Constructive cost Model (COCOMO)

Based on historical project data and current project characteristics such as product personel etc.

Effort=aSbEAF

a= based on the project type
S=size in lines of code, function points
EAF=

Question 6

Expert judgement?

Answer 6

1. Individual
   - ad hoc
   - company templates
2. Group
   - planning poker
   - widebanddelphi

Question 7

planning poker?

Answer 7

• uses Fibonacci sequence reflects the inherent uncertainty in estimating larger items

why does it work?

• decision about time estimation is individual
• if consensual —> decision

Question 8

wisdom of crowds?

Answer 8

decisions often better than if made by single members of the group

Better estimation if:

• diversity
• independency
• decentralization
• aggregation

Question 9

most common for Swedish companies with regards to estimation?

Answer 9

Expert judgement

Question 10

Research in cost estimation methods?

Answer 10

not very often tested practice in real organizations

Question 11

why we keep failing with cost estimate?

Answer 11

1. practitioners ability to estimate effect does not seem to improve
2. The knowledge provided by the researchers
3. The importance of asking questions

Question 12

practicers point of view?

Answer 12

1. changes in requirements

2.

Question 13

cognitive estimation biased?

Answer 13

optimism

wishfil thinking