The case study describes work undertaken to support decisions regarding truck replacement in a food corporation based in the United Kingdom. The corporation produces a wide range of food items and has an extensive distribution network. The use of a DSS in assessing the uncertainty inherent in estimating the cost elements associated with the purchase, operation and disposal of a truck is presented. A data base brings the discipline for the regular collection and easy updating of the cost elements. A Visual Basic module provides a simple, < at a glance >, visual means to assess and illustrate the sensitivity of the economic life and cost implications to uncertainty regarding the cost elements. The DSS provides a simple user interface, requiring only the use of a < mouse > for input, program control, and visual displays of output. Consideration of optimisation, sensitivity, what—if and goal—seeking analyses is implicit in the visual displays.