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Bottom-Up

What is the bottom-up method? Definition and meaning

The bottom-up method is an instrument of effort estimation. With it, individual work packages are estimated based on detailed planning. As a result, the required resources can be allocated more efficiently. Possible complications, such as public holidays and school holidays, are taken into account. This enables very precise planning.

The responsible project team member should demonstrate good specialist knowledge. This can prevent planning from being too generous. If there are deviations, however, it can be assumed that individual overestimated efforts will compensate for them. With an intelligent tool for resource planning potential problems and incorrect estimates can be countered effectively.

Advantages and disadvantages of the bottom-up method

Advantages

  • More precise effort estimations possible
  • Project team members are directly involved in planning

Disadvantages

  • High coordination and time effort
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Frequently asked questions

What is the bottom-up method?
The bottom-up method estimates the effort of a project by estimating individual work packages from detailed planning and merging them into an overall plan. This makes it possible to allocate the required resources more efficiently.
What are the advantages and disadvantages of the bottom-up method?
The advantages are more precise effort estimations and the direct involvement of project team members in planning. The downside is the high coordination and time effort. A structured project planning keeps this effort manageable.
What matters most in bottom-up estimation?
The responsible project team member should demonstrate good specialist knowledge so that planning is not too generous. Deviations often balance out, because individual overestimated efforts compensate for other items.