| Author | Perera, U. L. J. S. R. |
| Call Number | AIT Thesis no. IE-89-13 |
| Subject(s) | Scheduling (Management)--Mathematical models
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | A two-level hierarchical production planning model is developed
for the multi- machine, multi- item, multi- stage dynamic and stochastic
demand, variable production rate and perishable inventory problem
considering the depletion of inventory according to the first in first
out (FIFO) issuing policy and unidirectional flow of material inside
the factory. The deterioration of the utility of the inventories in time
is considered as an additional cost. In the first phase, it analyzes
the master production scheduling (MPS) problem and determines the
higher level production planning decisions for the MPS periods.
Production scheduling in first phase is carried out in t wo stages;
safety stock planning which determines the required safety stock
levels throughout the planning horizon, and aggregate planning which
determines the optimal level of resources during the planning periods.
The second phase issues the detail planning schedules for the lower
level scheduling of activities. The first stage of the second phase
determines the economic lot- sizes and cycle times for the extended
uncapacitated economic lot- sizing problem (ELSP) for the consideration
of perishability. Then the second stage adjusts the cycle times for
the feedback control of the system monitoring the forecasted demands
and inventory levels while maintaining the limitations of the capacity
of resources. The last stage determines the workforce allocation
considering the changes in the lot- sizes due to the adjustment of
cycle times. |
| Year | 1989 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Industrial Engineering (IE) |
| Chairperson(s) | Fujiwara, Okitsugu; |
| Examination Committee(s) | Tabucanon, Mario T.;Nagarur, Nagendra N.; |
| Scholarship Donor(s) | Deutscher Akademischer Austausch Dienst (DAAD), Federal Republic of Germany; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1989 |