中国矿业大学2011届本科生毕业论文 第41页
methods. These are categorized as either construction or improvement-type routines:
1. Construction-type layout routines: This type of routine generates a block layout based on the relationship between different departments. Among the most popular routines within this category are CORELAP (computerized relationship layout planning) (Lee ,and Moore 1967), ALDEP (Automated layout design) (Seehof ,and Evans 1967) and PLANET (Plant layout analysis and evaluation techniques) (Deisenroth ,and Apple 1972).
2. Improvement-type layout routines: This type of routine requires an input of a feasible block layout and aim to reduce movement cost by attempting simultaneous pair-wise (or more) position exchanging among the departments. Among the most popular improvement-type routines are CRAFT (computerized relative allocation of facilities technique) (Armour ,and Buffa 1963) and COFAD (Computerized facilities design) (Tompkins ,and Reed 1973).
Although computationally efficient, FLP heuristics are still far from meeting the constraints commonly found in daily layout tasks (Tam ,and Li 1991). Simulation has been requisitely used to incorporate many of these requirements into the facility layout study. The next section explains the benefits of simulation for facility layout studies.
2 WHY SIMULATION IN LAYOUT STUDIES?
According to Grajo (1996), layout optimization and simulation are two tasks that are crucial to any facility planning and layout study. According to Burgess et al. (1993), simulation is the only methodology robust enough to systematically examine the role and impact of product complexity and other key variables on factory performance. This is especially true because simulation models can capture many of