The correct answer is D. All of the above.
The critical path method (CPM) is a project management technique that is used to plan and schedule complex projects. It is an improvement upon the bar chart method because it provides a more realistic approach to daily problems. CPM avoids delays which are very common in bar charts by identifying the critical path, which is the sequence of tasks that must be completed on time in order to complete the project on time.
CPM is a valuable tool for project managers because it helps them to identify and manage risks, and to ensure that projects are completed on time and within budget.
Here is a brief explanation of each option:
- Option A: CPM is an improvement upon bar chart method.
CPM is a more sophisticated method than bar charts because it takes into account the dependencies between tasks. This means that CPM can identify the critical path, which is the sequence of tasks that must be completed on time in order to complete the project on time. Bar charts, on the other hand, do not take into account the dependencies between tasks, so they cannot identify the critical path.
- Option B: Provides a realistic approach to daily problems.
CPM provides a more realistic approach to daily problems because it takes into account the fact that tasks can take longer than expected, and that there can be delays due to unforeseen circumstances. Bar charts, on the other hand, assume that tasks will always take the same amount of time, and that there will be no delays. This can lead to unrealistic expectations, and can make it difficult to manage projects effectively.
- Option C: Avoids delays which are very common in bar charts.
CPM avoids delays which are very common in bar charts by identifying the critical path. The critical path is the sequence of tasks that must be completed on time in order to complete the project on time. CPM helps project managers to focus their attention on the critical path, and to take steps to ensure that these tasks are completed on time. This can help to avoid delays, and to ensure that projects are completed on time.