This paper critically evaluates De Reyck and Leus's 2008 article on capital budgeting for research and development projects, published in IIE Transactions. The authors argue that scheduling potential failure events early in a project's timeline can improve its expected net present value (NPV). This review agrees with the underlying premise but challenges the practical utility of the resulting model, noting that its mathematical complexity makes it inaccessible to decision-makers such as CFOs and production managers. The review also highlights an overlooked variable in high-risk R&D industries: risk-sharing through joint ventures and firm-wide capital budgeting, as seen in the pharmaceutical sector.
De Reyck and Leus begin their article with the underlying premise that capital budgeting for research and development projects is inherently different from capital budgeting for normal projects. They contend that the risk of total failure — resulting from failure at any given stage — adds an element of risk not found in conventional projects. Flowing from this assumption is the notion that the constituent activities of a project can be scheduled in such a manner as to increase the expected net present value (NPV) of the project.
Essentially, the NPV of an R&D project is taken to be a weighted average of all probable outcomes and the cash flows that result. Each outcome that results in failure will therefore carry a negative NPV that is included in the overall weighting. What De Reyck and Leus hypothesize is that if the potential failure events driving overall project failure are scheduled as close to the beginning of the project as possible, then the NPV will be improved. That is, if the project is doomed to fail, it is best to structure its development so that failure occurs earlier rather than later, thereby reducing sunk costs prior to that failure.
On the surface, this premise makes sense. Firms often evaluate projects on a pass/fail basis, but failure at different stages will naturally produce different degrees of negative NPV. As such, the less money spent before failure occurs, the higher the NPV for the project will be. Scheduling is therefore used as a means to alter one of the variables over which the firm has control — the losses incurred prior to project failure. On the whole, the core argument presented by the authors is sound.
"Mathematical complexity limits real-world usefulness for managers"
"Joint ventures and firm-wide risk spreading are overlooked"
"Model needs a practical interface for decision-makers"
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