Description
Bottom-up estimating is a technique used to estimate the cost and effort of a project by starting with the individual tasks and working up to the total project cost (or effort). This technique is often used in conjunction with top-down estimating, which starts with the overall project cost and breaks it down into individual tasks.
The most important advantage of bottom-up estimating is that it allows for more accurate estimates since it takes into account all the detailed information about the project. This information can include things like task duration, materials needed, and labor costs.
However, bottom-up estimating can be very time-consuming and may not always be possible if there is not enough detailed information available about the project. Additionally, this technique relies heavily on the expertise of those creating the estimates, which can lead to estimation errors.
Overall, bottom-up estimating is a useful tool that can help create more accurate project estimates. However, it is important to consider its limitations before using this technique for your next project.
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| Bottom-up Estimating |
When estimates are done at the lowest level in the beginning and then are aggregated to the higher levels, it is known as Bottom-up Estimating.
It is an independently-used project management tool.
Where it is Used
Process Groups
This tool is used in the following Process Group(s) during the project management.
Planning
Knowledge Areas
This tool is used in the following Knowledge Areas during project management.
Project Cost Mgmt.
Project Resource Mgmt.
Project Schedule Mgmt.
Activities
This technique is used while performing the following project management activities by the project manager and the team.
Estimate Costs
Estimate Activity Resources
Estimate Activity Durations
Process Group | Knowledge Area | Activity |
Planning | Project Cost Mgmt. | Estimate Costs |
Project Resource Mgmt. | Estimate Activity Resources | |
Project Schedule Mgmt. | Estimate Activity Durations |
