Spaghetti — Machine Shop Cell Rebuild
Two operators in a straight-line pump assembly cell walk 117 m over 17 legs with 10 route crossings; folding the same machines into a U with the material store presented in the middle cuts that to 40.5 m, a 65% saving, and removes every crossing.
Make it your own.
title "Cell 4 pump assembly — straight line vs U-cell"
scale 1m = 42px
room "Cell 4" 14m x 10m
zone "Kit marshalling" at 0.6,7.4 size 3x2.2
zone "Finished goods" at 10.6,7.4 size 3x2.2
# Machines were installed in process order along the wall, which is how
# almost every cell starts life and why the operators criss-cross it.
station Kit at 1.5,8.5
station Press at 2,2
station Lathe at 5,2
station Deburr at 8,2
station Assembly at 11,2
station Test at 13,5
station Pack at 12,8.5
station Store at 1.5,5
path "Operator 1" : Kit -> Press -> Lathe -> Store -> Deburr -> Assembly -> Store -> Test -> Pack -> Kit
path "Operator 2" colour: red : Store -> Press -> Store -> Assembly -> Store -> Pack -> Store -> Lathe -> Store
# Same machines, same routes — the cell is folded into a U and the
# material store is presented in the middle of it instead of at the wall.
scenario "After U-cell rebuild"
station Kit at 6.8,4.6
station Press at 5.2,2.4
station Lathe at 7,2.2
station Deburr at 8.8,2.4
station Assembly at 10,4.4
station Test at 8.8,6.4
station Pack at 7,6.6
station Store at 7.2,4.2