The Crystal Ball Factor
Typically, the project will be designed to handle forecasted sales demand for some time in the future (3 to 5 years). Therefore, the actual annual savings will fluctuate with volume, usually beginning small in the first year, and then gradually ramping up as business volume increases. This growth factor projection would have been included in the initial ROI calculations. However, if the sales forecast is flawed, or if market volatility and/or business conditions change such that the projected annual volume levels never materialize, that will reduce or, depending on how you look at it, protract the actual ROI. Unfortunately, a contingency factor here, big enough to offset the difference, will probably kill the project.
In the final analysis, you are left with trusting that the sales forecast is realistic.
Of course, there are design, construction, and financial risks in every project. But, there are also substantial business risks in being too conservative relative to adopting advances in technology that are proven to increase throughput and lower per piece handling cost.
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