平均正確率 ：38.5%
　　Which of the following are feedforward control models?
　　A project planning model which uses critical path analysis to identify in advance any delays that might postpone completion of the project, so that corrective action can be taken if necessary.
　　A production planning model that accesses information from sales forecasts to identify in advance any constraints on delivery vehicle capacity. Arrangements can be made to hire additional vehicles as necessary.
　　A variance analysis control model that uses pre-determined control limits to identify significant variances as soon as they arise, so that management action can be taken immediately.
　　A. (ii) and (iii) only.
　　B. (i) and (ii) only.
　　C. (i) and (iii) only.
　　D. All of the above.
　　正確答案：B
　　答案解析：
　　The correct answer is: (i) and (ii) only.
　　A feedforward control system involves forecasting future outcomes, and comparing these with desired outcomes. Control action is then taken to minimise or remove any differences. Models (i) and (ii) are therefore feedforward control models.
　　Model (iii) is a feedback control model, because it provides information on what has already happened, for comparison with a standard or plan (which in this case is the predetermined control limits).