Research Article
Solving Fuzzy Multiproduct Aggregate Production Planning Problems Based on Extension Principle
Table 2
Notation for parameters of the fuzzy APP model.
| Parameter | Definition |
| | Unit production cost excluding labour cost of th product in period ($/unit) | | Overtime labour cost of th product in period ($/man-hour) | | Labour cost of th product in period ($/man-day) | | Inventory carrying cost of th product in period ($/unit-period) | | Cost to hire one worker of th product in period ($/man-day) | | Cost to layoff one worker of th product in period ($/man-day) | | Unit backorder cost of th product in period ($/unit) | | Conversion factor in hours of labour per unit of production (man-hour/unit) | | Regular working hours per worker per day (man-hour/man-day) | | Fraction of working hours available for overtime production | | Planning horizon or number of periods | | Initial inventory level of th product (units) | | Initial work force level of th product (man-day) | | Initial backorder level of th product (units) | | Maximum workforce available of th product in period (man-day) | | Minimum demand of the th product in period (units) | | The number of products |
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