SAB_#55_Estimate Activity Durations_OK

Norma Escamilla
Mind Map by Norma Escamilla, updated more than 1 year ago
Norma Escamilla
Created by Norma Escamilla over 3 years ago
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Mind Map on SAB_#55_Estimate Activity Durations_OK, created by Norma Escamilla on 01/27/2017.

Resource summary

SAB_#55_Estimate Activity Durations_OK
1 Schedule Management Plan
1.1 The schedule management plan defines the method used and the level of accuracy along with other criteria required to estimate activity durations including the project update cycle.
2 Activity list
2.1 The activity list identifies the activities that will need duration estimates.
3 Activity attributes
3.1 The activity attributes provide the primary data input for use in estimating durations required for each activity in the activity list.
4 Activity resource requirements
4.1 The estimated activity resource requirements will have an effect on the duration of the activity, since the level to which the resources assigned to the activity meet the requirements will significantly influence the duration of most activities.
5 Resource calendars
5.1 The resource calendars influence the duration of schedule activities due to the availability of specific resources, type of resources, and resources with specific attributes.
6 Project scope statement
6.1 The assumptions and constraints from the project scope statement are considered when estimating the activity durations.
7 Risk Register
7.1 . The risk register provides the list of risks, along with the results of risk analysis and risk response planning
8 Resource breakdown structure
8.1 The resource breakdown structure provides a hierarchical structure of the identified resources by resource category and resource type.
9 Enterprise environmental factors
9.1 The enterprise environmental factors that can influence the Estimate Activity Durations process include, but are not limited to: • Duration estimating databases and other reference data, • Productivity metrics, • Published commercial information, and • Location of team members
10 Organizational process assets
10.1 The organizational process assets that can influence the Estimate Activity Durations process include, but are not limited to: • Historical duration information, • Project calendars, • Scheduling methodology, and • Lessons learned.
11 Expert judgement
11.1 guided by historical information, can provide duration estimate information or recommended maximum activity durations from prior similar projects. Expert judgment can also be used to determine whether to combine methods of estimating and how to reconcile differences between them.
12 Analogous estimating
12.1 Analogous estimating is a technique for estimating the duration or cost of an activity or a project using historical data from a similar activity or project. Analogous estimating uses parameters from a previous, similar project, such as duration, budget, size, weight, and complexity, as the basis for estimating the same parameter or measure for a future project.
13 Parametric estimating
13.1 is an estimating technique in which an algorithm is used to calculate cost or duration based on historical data and project parameters. Parametric estimating uses a statistical relationship between historical data and other variables (e.g., square footage in construction) to calculate an estimate for activity parameters, such as cost, budget, and duration.
14 Three-point estimates
14.1 PERT uses three estimates to define an approximate range for an activity’s duration: •Most likely (tM). . •Optimistic (tO), . •Pessimistic (tP).
15 Group decision-making techniques
15.1 Team-based approaches, such as brainstorming, the Delphi or nominal group techniques, are useful for engaging team members to improve estimate accuracy and commitment to the emerging estimates
16 Reserve analysis
16.1 Duration estimates may include contingency reserves, sometimes referred to as time reserves or buffers, into the project schedule to account for schedule uncertainty. Contingency reserves are the estimated duration within the schedule baseline, which is allocated for identified risks that are accepted and for which contingent or mitigation responses are developed. Contingency reserves are associated with the “known-unknowns,” which may be estimated to account for this unknown amount of rework.
17 Activity duration estimates
17.1 Activity duration estimates are quantitative assessments of the likely number of time periods that are required to complete an activity.
18 Project documents updates
18.1 Project documents that may be updated include, but are not limited to: • Activity attributes; and • Assumptions made in developing the activity duration estimate, such as skill levels and availability, as well as a basis of estimates for durations.
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