aCPM

In the chapter No. 22, the concept of Critical
chain is introduced when a non-critical path’s activity leads to delays that
the critical path of the project keeps changing. It explains the importance of
sequencing activities in a project not only based on tasks but also on the
availability of the resources. The resources involved in certain specific
activities can lead to delays in the project and therefore it becomes very
importance to take resource availability as an important factor while scheduling
activities in a project. Now the concept of bottleneck i.e. when there is
strict resource employment or a particular task which leads to delays and
shuffle of critical path.

In order to explain the concept of critical chain
the author has portrayed the scenario of a classroom where the issue of shuffle
in the critical path occurred in one of the students project. Upon further investigation
and question answer session between students and the lecturer the concept of
critical chain was explained.

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To understand the same let us that take an
example of any construction firm working up on an Infrastructure project. The
Project is constructing a world class sports complex. Now the construction of such
huge level sports complex would require certain specific activities in certain
paths of the network diagram. Let us take waterproofing as one such activity. There
is a specialized team for waterproofing activity. Let the water-proofing
activity be WP.

 

 

 

 

 

 

 

 

As seen from the network diagram that waterproofing
activity WP is present in all paths of the network diagram of the project. The
sequencing of tasks in a particular path as per hierarchy of work to be done is
important but keeping in mind the fact that we have only a single specialized
team available for waterproofing we must make sure that the activities are not
parallel in the paths. If the activities are parallel any delay in WP will not
only affect the feeder buffer of the particular path but will also affect the
path having the activity WP in parallel. Which will result in change of
critical path during the project. Therefore WP should be scheduled such that no
WP is parallel in the network diagram and takes place simultaneously. In this way
nay delay in the activity WP will be absorbed by the feeder buffer of the particular
path and will not affect the overall project buffer. Hence delay of the overall
project can be avoided i.e. W and should absorb only the feeder buffer and not
the project buffer. This is the optimization of schedules of the resource.

 

 

 

 

 

 

 

 

 

Hence a critical chain of the activity W
should be made in such a way that the activity W is done simultaneously in the
paths (critical or non-critical) and the sequence will not matter. Therefor for
any construction organization it is important to schedule project based not
only on tasks but also on the resource availability in order to avoid delays
and jumps of critical path during certain stage of the project. This will not
only avoid the problem of shuffle of critical path during a project but will
reduce the chances of any delay in the project due the activity WP.In the chapter No. 22, the concept of Critical
chain is introduced when a non-critical path’s activity leads to delays that
the critical path of the project keeps changing. It explains the importance of
sequencing activities in a project not only based on tasks but also on the
availability of the resources. The resources involved in certain specific
activities can lead to delays in the project and therefore it becomes very
importance to take resource availability as an important factor while scheduling
activities in a project. Now the concept of bottleneck i.e. when there is
strict resource employment or a particular task which leads to delays and
shuffle of critical path.

In order to explain the concept of critical chain
the author has portrayed the scenario of a classroom where the issue of shuffle
in the critical path occurred in one of the students project. Upon further investigation
and question answer session between students and the lecturer the concept of
critical chain was explained.

To understand the same let us that take an
example of any construction firm working up on an Infrastructure project. The
Project is constructing a world class sports complex. Now the construction of such
huge level sports complex would require certain specific activities in certain
paths of the network diagram. Let us take waterproofing as one such activity. There
is a specialized team for waterproofing activity. Let the water-proofing
activity be WP.

 

 

 

 

 

 

 

 

As seen from the network diagram that waterproofing
activity WP is present in all paths of the network diagram of the project. The
sequencing of tasks in a particular path as per hierarchy of work to be done is
important but keeping in mind the fact that we have only a single specialized
team available for waterproofing we must make sure that the activities are not
parallel in the paths. If the activities are parallel any delay in WP will not
only affect the feeder buffer of the particular path but will also affect the
path having the activity WP in parallel. Which will result in change of
critical path during the project. Therefore WP should be scheduled such that no
WP is parallel in the network diagram and takes place simultaneously. In this way
nay delay in the activity WP will be absorbed by the feeder buffer of the particular
path and will not affect the overall project buffer. Hence delay of the overall
project can be avoided i.e. W and should absorb only the feeder buffer and not
the project buffer. This is the optimization of schedules of the resource.

 

 

 

 

 

 

 

 

 

Hence a critical chain of the activity W
should be made in such a way that the activity W is done simultaneously in the
paths (critical or non-critical) and the sequence will not matter. Therefor for
any construction organization it is important to schedule project based not
only on tasks but also on the resource availability in order to avoid delays
and jumps of critical path during certain stage of the project. This will not
only avoid the problem of shuffle of critical path during a project but will
reduce the chances of any delay in the project due the activity WP.

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