On the allocation of uncertainty-reduction effort to minimize total variability

Yigal Gerchak*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Manufacturing processes and projects often consist of a series of activities with uncertain durations. The resulting uncertainty of the process or project impedes planning and disrupts the supply chain. Suppose that the uncertainty of the duration of individual activities can be reduced at a cost. We wish to minimize the variability of the sum of these durations, i.e., the variability of the project's duration. Using mean-preserving transformations, we derive the optimal budget allocation among individual activities for separable and non-separable cost functions, and also explore the implications of statistical dependence on the allocation.

Original languageEnglish
Pages (from-to)403-407
Number of pages5
JournalIIE Transactions (Institute of Industrial Engineers)
Issue number5
StatePublished - May 2000
Externally publishedYes


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