Table 1 Notation.
From: Application of the adaptive sparrow search algorithm in medical supply engineering
Symbol | Description | Symbol | Description |
|---|---|---|---|
\(\:{x}_{t}\) | Demand for robots in week \(\:t\) | \(\:{c}_{v}\) | Unit price of containers under routine procurement |
\(\:{v}_{t}\) | Number of containers procured through routine procurement | \(\:{c}_{h}\) | Unit price of manipulators under routine procurement |
\(\:{h}_{t}\) | Number of manipulators procured through routine procurement | \(\:{c}_{v}^{\text{high\:}}\) | Unit price of high-cost, ready-to-use containers |
\(\:{v}_{t}^{\text{high\:}}\) | Number of high-cost, ready-to-use containers | \(\:{c}_{h}^{\text{high\:}}\) | Unit price of high-cost, ready-to-use manipulators |
\(\:{h}_{t}^{\text{high\:}}\) | Number of high-cost, ready-to-use manipulators | \(\:{m}_{v}\) | Weekly maintenance cost per container |
\(\:{V}_{t}\) | End-of-week available container inventory | \(\:{m}_{h}\) | Weekly maintenance cost per manipulator |
\(\:{H}_{t}\) | End-of-week available manipulator inventory | \(\:{t}_{h}\) | Training cost per manipulator |
\(\:{V}_{0}\) | Initial container inventory (13) | \(\:\mu\:\) | Number of manipulators required per robot (4) |
\(\:{H}_{0}\) | Initial manipulator inventory (50) | \(\:\gamma\:\) | Number of new manipulators a skilled manipulator can train per week (10) |
\(\:{{\uptau\:}}_{\text{v}}\) | Preparation lead time for new containers (1 week) | \(\:{\tau\:}_{h}\) | Training lead time for new manipulators (1 week) |
\(\:{p}_{t}\) | Scrap rate of robots due to macrophage encounters in week t | \(\:\rho\:\) | Scrap rate per robot encountering a macrophage |
