Table 5 Cumulative supply and cumulative demand of all materials
From: Resource-loaded piping spool fabrication scheduling: material-supply-driven optimization
Material name | 6″, Sch.40 Pipe | 2″, Sch.80 Pipe | 3″, Sch.40 Pipe | 2″, Sch.80 Elbow | 6″, Sch.40 Elbow | 2″, Sch.80 Flange | ||||||
Time | Quantity | Time | Quantity | Time | Quantity | Time | Quantity | Time | Quantity | Time | Quantity | |
Supply | 0 | 5 | 0 | 1 | 0 | 1.3 | 0 | 1 | 0 | 4 | 0 | 1 |
120 | 22.4 | – | – | – | – | – | – | – | – | – | – | |
Demand | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
12 | 0.6 | 174 | 1 | 362 | 1.3 | 54 | 1 | 12 | 3 | 54 | 1 | |
27 | 1.2 | – | – | – | – | – | – | 115 | 4 | – | – | |
84 | 3.9 | – | – | – | – | – | – | – | – | – | – | |
115 | 4.5 | – | – | – | – | – | – | – | – | – | – | |
185 | 16.6 | – | – | – | – | – | – | – | – | – | – | |
274 | 22.4 | – | – | – | – | – | – | – | – | – | – | |
Material name | 3″, Sch.40 Flange | 2″ × 6″, Sch.80/Sch.40 Olet | 6″ Hydro pipe | 6″ × 3″, Sch.40 Reducer | 6″, Sch.40 Tee |  |  | |||||
Time | Quantity | Time | Quantity | Time | Quantity | Time | Quantity | Time | Quantity | Â | Â | |
Supply | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | Â | Â |
180 | 1 | 180 | 1 | – | – | 120 | 1 | – | – |  |  | |
Demand | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | Â | Â |
447 | 1 | 313 | 1 | Â | Â | 221 | 1 | 84 | 1 | Â | Â | |