Which approach helps estimate costs effectively in procurement?

The correct choice is total cost of ownership analysis because this approach provides a comprehensive view of all costs associated with a product or service over its entire lifecycle. This includes not only the initial purchase price but also other expenses such as maintenance, operation, training, and disposal costs. By assessing all these factors, procurement professionals can develop a more accurate estimate of total costs, leading to better decision-making.

In contrast, direct comparison with competitors may provide some insight into pricing trends but does not account for the specific costs associated with the entire lifecycle of the product. Cost reduction strategies are beneficial for minimizing expenses but may overlook the implications of long-term costs in favor of short-term savings. Marketing campaign evaluation is related to the effectiveness of outreach efforts and does not pertain to cost estimation in procurement. Therefore, total cost of ownership analysis stands out as the most effective approach for accurately estimating costs in procurement.