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| Parameters and variables of suppliers |
|
| VCON: demand rate of suppliers | AVCON: demand factor of suppliers after smoothing |
| VINV: inventory level of suppliers | TINV: system target inventory level |
| WIP: work-in-process inventory level | TWIP: target work-in-process inventory level |
| EINV: inventory deviation | EWIP: deviation of work-in-process inventory |
| ORT: productivity of suppliers | CRT: production fulfillment rate of suppliers |
| : adjustment time of system inventory deviation | : demand rate of suppliers smooth time |
| : work-in-process inventory deviation adjustment time | : production delay time of suppliers |
| AEWIP: work-in-process inventory deviation regulation factor | |
| AEINV: deviation adjustment rate of system inventory | |
|
| Parameters and variables of retailers |
|
| CON: demand rate of retailers | ACON: demand rate of retailers after forecasting |
| RINP: inventory level of retailers (including inventory on the way) | SS: safety inventory level |
| G: safety inventory factor of retailers | ROP: reorder-point of distributors |
| SRT: delivering rate to retailers | |
|
DSS: reorder-point of retailers variation | |
| GIT: inventory of distributors on the way | |
| RINV: actual inventory level of retailers | |
| L: transportation time from suppliers to retailers | |
| ETQ: economic order quantity | |
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