The inputs to the CRAFT model are similar to those used in link analysis travel charting and operations sequence analysis. In addition, any department or departments may be fixed in particular locations. The CRAFT model can generate and evaluate layouts having as many as 40 departments in less than one minute of computer time. The superiority of results obtained by earlier techniques was in no small way dependent upon the art of the layout analyst.

Area of departments The CRAFT model represents a breakthrough in the ability to systematically evaluate layout problems having complex flow.

The program calculates the effect on the total cost of exchanging departments if this leads to a reduction, the change is made and it leads to iteration. It makes improvements by exchanging pairs of departments iteratively until no further cost reductions are possible. CRAFT uses a pair wise exchange to develop an improved layout. With these inputs and an initial layout in the program, CRAFT attempts to improve the relative placement of the departments as measured by total material handling cost for the layout.ĬRAFT is a method of “successive” improvements.

It requires a load and a distance matrix as initial inputs and also feeds in data regarding the cost involved per unit distance moved. CRAFT method uses the same basic idea used for a factory layout with certain significant operational differences. It starts with an initial layout and improves the layout by interchanging the departments pair-wise so that the transportation cost is minimized. It is more widely used than ALDEP and CORELAP. CRAFT algorithm was originally developed by Armour and Buffa in the 1970s. CRAFT (Computerized Relative Allocation of Facilities Technique) CRAFT (Computerized Relative Allocation of Facilities technique) is the most widely applied. Problem optimality is achieved when facilities do not overlap and the total cost, which is the sum of weighted distances between all pairs of facilities, is minimized. Each of these facilities has a given area, and the cost of interactions between every facility pair is known.

Layout problems often involve a given number of facilities which must be located in the plane. Originally developed in late 60’s and early 70s, many of these packages are still around with latest additions to their features. But the most time tested computerized layout techniques and software program packages that are frequently used are- CRAFT, CORELAP, ALDEP, etc.

ABDUL NAYEEM PhD Batch -2010 COMPUTERIZED LAYOUT ANALYSIS TECHNIQUES In the field of computerized layout analysis, a number of computerized layout programs have been developed since the 1960s and 70s.

OPERATIONS MANAGEMENT ASSIGNMENT Topic: COMPUTERIZED LAYOUT ANALYSIS TECHNIQUES Submitted By: SAMYADIP CHAKRABORTY MOHD.

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