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4 Diagram Space Relationships Spatial representation

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4 Diagram Space Relationships Spatial representation

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    1. IE 419 1

    2. IE 419 2 4) Diagram Space Relationships (Spatial representation)

    3. IE 419 3 4) Diagram Space Relationships (Compress to floor plan)

    4. IE 419 4 5) Evaluating Alternatives List important factors Flexibility, ease of expansion, Effectiveness of flow, ease of material handling Safety, ease of supervision Aesthetics, appearance Weigh relative importance (0-10 max) Rate alternatives by each factor (4,3,2,1,0) Multiply ratings by weights Sum products and compare totals Largest = best

    5. IE 419 5

    6. IE 419 6 6) Detail Final Layout (Install)

    7. IE 419 7 Computerized Plant Layout Programs to assist in generating numerous alternate layouts and evaluating numerically Construction programs – build from scratch (SPIRAL) Improvement programs – interchange areas of initial layout, until best is found (Factory Flow) Programs minimizing transportation costsCRAFT (1963) – minimize transport (+ distance) costs Programs that computerize Muther’s approach, ALDEP, CORELAP (IBM, 1967), SPIRAL

    8. IE 419 8 SPIRAL Maximizes adjacency (closeness rating) Also minimizes distance Closest areas ? highest adjacency Use in construction mode Available in 235 Leonhard (IE 327 lab) Need two files (in NotePad, using All Files mode, NOT Text [.txt] mode) *.DAT (basic data) *.DEP (dependencies or relationships)

    9. IE 419 9 DORBEN.DAT (edit existing files)

    10. IE 419 10 Dorben Ex. DAT File

    11. IE 419 11 DORBEN.DEP (create from scratch, each line has 8 columns)

    12. IE 419 12 DORBEN.DEP After 8 column lines, last set of lines specify departmental relationships using 3 columns Dept #1 code Dept #2 code Closeness rating value Last line signifies end: OUT OUT 0

    13. IE 419 13 Dorben Ex. DEP File

    14. IE 419 14 Running SPIRAL Click on SPIRAL icon Click on FILE, then OPEN, select Dorben.DAT Under FILE, click on OUTPUT.LOG to save statistics Click on ALGORITHMS, select ALL GRAPHS for algorithmic relationship calculations Click on ALL LAYOUTS for space relationships Click on EVALUATE for final evaluation Click on STATISTICS to see results Largest ADJACENCY, EFFICIENCY are best Shortest DISTANCE is best Rerun with different SEED, to avoid local optimum

    15. IE 419 15 Dorben Results - Layout

    16. IE 419 16 Dorben Results - Statistics

    17. IE 419 17 Problems with Computerized Layout Long, narrow rooms Change shape ratio to 1:1 Increase shape penalty Unrealistic shapes (Ls, Ts) – define better Local minima for improvement programs Use different seed Use alternate layouts

    18. IE 419 18 Calculation of Adjacency Adjacency = ?positive relationships for adjacent areas - ?negative relationships for adjacent areas

    19. IE 419 19 Compare SLP Layout with SPIRAL

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