Ser | Notations | Description |

1 |
| Production rate. |

2 |
| Demand rate at time T where is any positive integer and satisfying the condition. |

3 |
| Very small amount of constant decay rate for unit inventory. |

4 |
| Inventory level at instant. |

5 |
| Un-decayed inventory at to. |

6 |
| Un-decayed inventory at to. |

7 |
| Deteriorating inventory at to. |

8 |
| Deteriorating inventory at to. |

9 |
| Inventory level at time T which depicts 0 and respectively at and. |

10 |
| Vary small portion of instant. |

11 |
| Set up cost. |

12 |
| Average holding cost. |

13 |
| Total cost in terms of. |

14 |
| Optimum order quantity. |

15 |
| Optimum order interval. |