M6 - Estimating - How & When

Question 1

Estimation Techniques in AgilePM

Answer 1

• Use the DSDM contingency provided by applying MoSCoW to scope out the features
• Asking people involved for estimates
• Creating estimates as precise and accurate as necessary for their purpose

Question 2

Top down estimating (4)

Answer 2

Re-estimation happens throughout the project. Don’t stick to original numbers when you get more information!

• Best estimates happen when the SDT work together.
• The team who does the work should do the estimate
• Allow for non productive time (buffer)

T Shirt Estimating

Assigns S, M, L, XL

Estimating by Story Point

Consensus based that uses group discussion to assign a relative size to each story

Points are calibrated against time

Estimating by Example

Used for T-shirt and Story point estimation

Estimating by Velocity

Uses teams previous performance to project what can be expected in the future

Question 3

Bottom Up style of Estimating

Answer 3

• Each component broken into individual elements, makes it much more accurate but takes much longer.
• Can be time consuming for large pieces of work. Not a practical choice for project or increment estimating in the early project Lifecyle phases.