Despite the efforts made to decrease the shortages of health workers (see Table 5 for a summary of the main policies), such shortages remain a critical constraint for service delivery.
When the value of the parameter (b) increases, the optimal selling price (s^*) will decrease if shortages are partially and completely backlogged.
When the value of the parameters (a, H, c, M) and (I_mathrm{c}) increases, the optimal total profit (mathrm{TP}^*) will increase and the rest of the value of the parameters, the optimal ordering cycle time (T^*) will decrease if shortages are completely backlogged except the values of (c_0) and (delta.) 10.
When the value of the parameters (a, b, K, H, theta, M, c_2, I_mathrm{c}) and (lambda) increase, the optimal order quantity (Q^*) will increase and for the rest of the parameters (Q^*) will decrease when shortages are completely backlogged except (c_0) and (delta.) Due to the advent of modern technology and heavy market competition, the life cycle of products has been greatly shortened.
When the value of the parameters (a, H, M) and (I_mathrm{c}) increases, the optimal total profit (mathrm{TP}^*) will increase, and the rest of the value of the parameters, the optimal total profit (mathrm{TP}^*) will decrease if shortages are partially backlogged.
When the value of the parameters (a, b, K, H, theta, M, c_2, I_mathrm{c}) and (lambda) increase, the optimal order quantity (Q^*) will increase and for the rest of the parameters (Q^*) will decrease when shortages are completely backlogged except (c_0) and (delta.) .
In the past ten years, major efforts have been undertaken by all four countries to decrease the shortages of health workers.
We hypothesized that the implementation of a new Pharmacy Computerized Inventory Program (PCIP) would optimize medication availability and decrease medication shortages.
Currently, domestic policies to improve health care and the health workforce including innovations such as new skilled health worker cadres and OSD policies appear to have served to decrease SHW shortages to some extent.
Accordingly, this caused the decrease of shortage in warehouse inventories, the postponed orders, and the delay in responding to the customers' needs; at the same time, the loading and usage rates of distribution centers are increased.
