Corelap
CORELAP: Computerized Relationship Layout Planning
Layout design IV.
Developed for main frame computers
Construction type
Adjacency‐based method
Chapter 6
◦ CORELAP uses A=4, E=3, I=2, O=1, U=0 and X=‐1
values
Layout generation
CORELAP
ALDEP
MULTIPLE
MIP – in labs
Selection of the departments to enter the
layout is based on Total Closeness Rating
◦Total Closeness Rating (TCR) for a department is
the sum of the numerical values assigned to the
closeness relationships between the department
and all other departments.
TCR =
m
∑w
j =1,i ≠ j
CORELAP
CORELAP
Department selection
ij
Department placement
1. The first department placed in the layout is the one with the greatest TCR value. If there is a tie, then choose the one with
more A’s (E’s, etc.).
2. If a department has an X relationship with the first one, it is
placed last in the layout. If a tie exists, choose the one with
the smallest TCR value.
3. The second department is the one with an A relationship with
the first one (or E, I, etc.). If a tie exists, choose the one with
the greatest TCR value.4. If a department has an X relationship with the second one, it is
placed next‐to‐the‐last or last in the layout. If a tie exists,
choose the one with the smallest TCR value.
5. The next department is the one with most A (E, I, etc.)
relationships with the already placed departments. If a tie
exists, choose the one with the greatest TCR value.
6. The procedure continues until all departments have been
placed. Placement sequence
•
Department neighbors
o
o
•
Adjacent (in position 1, 3, 5 or 7) with department 0
Touching (in position 2, 4, 6 or 8) department 0
8
7
1
0
6
5
2
3
4
Placing rating (PR) is the sum of the weighted closeness ratings between the
department to enter the layout and its neighbors.
PR = ∑ wik where k = {departments already placed}
k
•The placement of departments is based on the following steps:
1. The first department selected is placed in the middle.
2. The placement of a department is determined by evaluating PR for all possible
locations around the current layout in counterclockwise order beginning at the
“western edge”.
3. The new department is located based on the greatest PR value.
1
10/26/2011
CORELAP –Example 1
CORELAP – Example 1
A=4, E=3, I=2, O=1, U=0, X=‐1
Given the relationship chart and the departmental dimensions
below determine the sequence of the placement of the
departments in the layout based on the CORELAP algorithm. Place
the departments in the layout while evaluating each placement.
The first department placed in the layout is the one with the greatest TCR value. If there is a tie, then choose the
one with more A’s (E’s, etc.).
Dept.
Sq.ft.
1. Conf Room
100
200
Summary
1
2
3
4
5
6
7
8
9
1 2 3 4 5 6 7 8 9
‐ I I U O U U U U
I ‐ OUOUUUO
I O‐ UI OOEU
UUU‐ OOOOO
OOI O‐ AAOO
UUOOA‐ I OE
UUOOAI ‐ UO
UUEOOOU‐ I
UOUOOEOI ‐
A E I O U X
002150
001340
012320
000530
201500
111320101330
011330
011420
4
3. Sales
300
6
4. Personnel
500
10
5. Plant Mng.
100
2
6. Plant Eng
500
10
7. P. Supervisor
100
2
8. Controller Office
50
1
9. Purchasing Dept
300
6
TCR
Placement
The second department is the one with an A relationship
with the first one (or E, I, etc.). If a tie exists, choose the one with the greatest TCR value.
Dept.
Department relationships
Summary
1
2
3
4
5
6
7
8
9
1 2 3 4 5 6 7 8 9
‐ I I U O U U U U
I ‐ OUOUUUO
I O‐ UI OOEU
UUU‐ OOOOO
OOI O‐ AAOO
UUOOA‐ I OE
UUOOAI ‐ UO
UUEOOOU‐ I
UOUOOEOI ‐
A E I O U X
002150
001340
012320
000530
201500
111320
101330
011330
011420
TCR...
Regístrate para leer el documento completo.