Tactical Planning Model 1. Time Horizon of the Tactical Planning

Tactical Planning Model

1. Time Horizon of the Tactical Planning Model Discuss each objective of the tactical model. How long is the time horizon required to address each of the specific objectives? How many time periods does the model consider? Why are multiple time periods essential in the tactical model?

2 . Segmentation of the Tactical Model

Discuss the proposed segmentation of the tactical model . What are the functions , inputs , and outputs of the demand -forecasting module , preprocessor , matrix generator , linear – programming optimization routine, postprocessor, and report generator? How does the preprocessor help in reducing the computational requirements of the linear – programming model?

3 . Objective Function of the Tactical Linear – Programming Model

Why is cost minimization preferred over profit maximization ? What cost elements are implicit in the order – reassignment cost ? Why are inventory – carrying charges divided into weekly and monthly charges ? What additional cost elements might you include in a tactical model such as this one ?

4 . Demand Constraints

Discuss each term in the demand constraint . How is the righthand – side element of these constraints determined ? How many constraints are there ? What are the implications of these constraints with regard to aggregation of information ? How would you interpret the shadow prices associated with these constraints ? What feedback would these shadow prices provide to the strategic – planning model ?

5 . Hot – Metal , Casting – Machine Capacity , Production Bounds , and Combination Constraints.

Analyze the nature of these constraints. Discuss their shadow-price in feedback implications to the strategic-planning model.

6. Ending -Inventory Constraints

Discuss the nature of these constraints. How would you specify the value of the righthand sides of these constraints? Are there alternative ways of expressing inventory targets, particularly when only safety stocks are involved and the model is going to be updated every review period? How taxing are these constraints in terms of computational requirements?

7. Reassignment-Balance Constraints

These constraints are critical for understanding the computational economies introduced by the preprocessor. Discuss what happens when only one reassignment alternative is considered for every order; what computational implications does this have? Interpret the shadow price associated with these constraints. Indicate an alternative formulation of the tactical-planning model without using the preprocessor or reassignment-decision variables

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