- Estimation of time and resources for activity : The estimation of activity duration without bias is very important . To avoid bias in the estimate , we can follow some guidelines which are described as follows -
- A group of experts should estimate the time and resource of the activity .
- The estimate of activity duration should be done activity by activity and time estimate of one activity should not affect that of the other .
- The estimate should be based on normal level of work for labour and equipment .
- In the schedule , normal days should be considered ; weekends and holidays should be specified in the project .
Methods of time estimate : Depending on the type of calculation on the schedule/network , different methods of time estimates have been in practice . The most popular methods are given below -
- Definite time estimation : In this method , each activity is specifided only one time . This time is used normally to calculate project durations , finding critical path , earliest start and finish of activity , etc .
- Two time estimate method : We specify two activity duration to each of the activity . These activity durations are
- Normal activity duration
- Crash activity duration
Normal activity duration is the time of carrying out activity considering normal level of resource such as labour and equipment. Sometimes, we require to know the shortest possible activity duration, if we supply enough resources.
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