Aldep Automated Layout Design Program Download 31851.html Styler Si
ALDEP Automated Layout Design Program
ALDEP is a computerized algorithm that can be used to design or evaluate the layout of facilities, such as machines, departments, or workstations, in a production system. ALDEP stands for Automated Layout Design Program, and it was developed by Seehof and Evans in 1967. ALDEP can handle both single-story and multi-story layouts, and it can incorporate various criteria, such as material handling costs, closeness ratings, space requirements, and adjacency constraints. ALDEP is one of the most widely used layout design methods in the literature and practice.
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How ALDEP Works
ALDEP works by placing the facilities one by one on a grid, according to their relationship with the previously placed facilities. The algorithm consists of two main procedures: selection and placement. The selection procedure determines which facility to place next, based on the total closeness rating (TCR) of each facility with the already placed facilities. The TCR is a measure of how desirable it is to place two facilities close to each other, and it is usually obtained from a from-to chart or a relationship diagram. The facility with the highest TCR is selected for placement. The placement procedure determines where to place the selected facility on the grid, based on the minimum material handling cost (MMC) criterion. The MMC is a measure of how much it costs to transport materials between two facilities, and it is usually calculated from the distance and the flow rate between them. The selected facility is placed on the grid location that minimizes the MMC with the already placed facilities. If there are multiple locations with the same MMC, then a tie-breaking rule is applied, such as choosing the location closest to the center of gravity of the layout.
Advantages and Disadvantages of ALDEP
ALDEP has some advantages and disadvantages as a layout design method. Some of the advantages are:
It is easy to implement and understand.
It can handle both qualitative and quantitative criteria.
It can generate alternative layouts for comparison and evaluation.
It can incorporate various constraints and preferences.
Some of the disadvantages are:
It may produce suboptimal layouts due to its sequential and greedy nature.
It may be sensitive to the order of placement and the initial location.
It may not be able to handle complex shapes and sizes of facilities.
It may not be able to deal with dynamic and stochastic factors.
Conclusion
ALDEP is a computerized algorithm that can be used to design or evaluate the layout of facilities in a production system. It works by placing the facilities one by one on a grid, according to their relationship with the previously placed facilities. It has some advantages and disadvantages as a layout design method. ALDEP is one of the most widely used layout design methods in the literature and practice.