A cold rolling lot sizing and scheduling problem was abstracted as multi-stage,multi-item lot sizing and scheduling one with buffers.

Multi-project production planning and scheduling system based on workflow;

First,the characteristics and the developing status quo of the cigarette factory manufacturing execution system(MES) is analyzed,based on this the tobacco strips product line is introduced,the deficiencies in its current planning and scheduling management is pointed out,and in order to solve the problem,a schedule simulation system is put forward.

The integrated planning and scheduling problem between steelmaking, continuous casting and hot rolling is the key of the integrated steel production management.

A multi-level,multi-type batch planning and scheduling problem,in which material is arranged on facilities to insure continuity of production,to meet the requirement of product order,and to control inventory within a reasonable range,is abstracted from cold rolling production management practices.

The problem of integrated batch planning(IBP) is studied,which is the key issue of MES system in iron and steel industry.

The lot sizing problem with fuzzy customer demands and multi technological constraints was studied by taking advantage of the fuzzy set theory and the idea of tolerance.

Uncapacited single item lot sizing problem (SULS) is a basic form of general lot sizing problem.

The lot sizing problem in group technology production is called group technology lot sizing problem(GTLS).

A monolithic model of the lot-sizing and scheduling problem based on the JIT strategy has been proposed in this paper,and a heuristic algorithm using integrated method has been designed to solve it.