14. A project manager is about to begin estimating the costs of a project and generates the work breakdown structure. Because of the nature of the work packages, the time and cost estimates are highly uncertain.
Answer: D
Range
Using a range for cost estimates is appropriate when the time and cost estimates are highly uncertain, as it allows for flexibility in budgeting by providing a spectrum of potential costs rather than a fixed number.
A) Ratio method
The ratio method involves estimating costs based on historical data and ratios, which may not effectively accommodate the high uncertainty present in the work packages. This method is more suited for projects with well-defined parameters and less variability, making it less appropriate in this context.
B) Consensus method
The consensus method relies on gathering input from various stakeholders to arrive at a collective estimate. While it can be useful in refining estimates, it might not address the inherent uncertainty of the work packages effectively, potentially leading to inaccurate results.
C) Apportionment
Apportionment involves distributing total project costs based on the proportion of work completed. This method assumes a level of certainty in estimates that is inconsistent with the high uncertainty described, making it less suitable for the project manager's needs.
D) Range
A range is ideal for situations with high uncertainty, as it allows the project manager to provide estimates that reflect the potential variability in costs. This approach acknowledges the unpredictability of the work packages and helps in preparing for financial contingencies.
Conclusion
The range option clearly aligns with the uncertainties involved in estimating the costs of the project, allowing for a flexible approach to budgeting. In contrast, the other methods either rely on fixed estimates or do not adequately account for the variability in the work packages, making them unsuitable for this particular scenario.