1. What is Days Of Supply (DOS)?

Days Of Supply (DOS) is a military inventory management metric that calculates how many days current stock levels will last based on daily consumption rates. It helps in planning resupply operations and maintaining optimal inventory levels.

2. How Does the Calculator Work?

The calculator uses the DOS formula:

Where:

• \( DOS \) — Days of Supply (days)
• \( \text{On-Hand Stock} \) — Current inventory quantity (units)
• \( \text{Daily Demand} \) — Average daily consumption rate (units/day)

Explanation: This simple division provides the number of days until stock depletion, assuming constant daily demand.

3. Importance of DOS Calculation

Details: DOS is critical for military logistics planning, ensuring continuous supply chain operations, preventing stockouts, optimizing inventory costs, and supporting mission readiness.

4. Using the Calculator

Tips: Enter on-hand stock in units and daily demand in units per day. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is considered an optimal DOS value?
A: Optimal DOS varies by item type and mission requirements, but typically ranges from 7-30 days depending on supply chain reliability and item criticality.

Q2: How often should DOS be calculated?
A: DOS should be calculated regularly, ideally daily for critical items and weekly for standard inventory, to maintain accurate supply planning.

Q3: What factors affect daily demand?
A: Daily demand can be influenced by troop strength, mission intensity, seasonal factors, operational tempo, and specific mission requirements.

Q4: How does DOS differ from EOQ?
A: DOS focuses on consumption timeframe, while Economic Order Quantity (EOQ) optimizes order size to minimize total inventory costs.

Q5: What actions should be taken based on DOS results?
A: Low DOS triggers reordering, high DOS may indicate overstocking, and critical DOS levels require immediate resupply requests.