1. What is DART?

DART (Days Away, Restricted, or Transferred) is a safety metric used to measure workplace safety. It represents the number of recordable incidents per 200,000 hours worked that result in days away from work, restricted work activity, or job transfer.

2. How Does the Calculator Work?

The calculator uses the DART formula:

Where:

• \( days\ away \) — Number of days away from work due to injury
• \( restricted\ cases \) — Number of cases with work restrictions
• \( hours \) — Total hours worked by all employees
• 200,000 — Equivalent of 100 employees working 1 year

Explanation: The formula standardizes injury rates across organizations of different sizes by using a base of 200,000 hours (about 100 employees working full-time for a year).

3. Importance of DART Calculation

Details: DART is a key OSHA metric that helps organizations track serious workplace injuries and illnesses. It's used for benchmarking safety performance and identifying areas for improvement.

4. Using the Calculator

Tips: Enter the total number of days away cases, restricted work cases, and total hours worked by all employees. All values must be valid (non-negative numbers, hours > 0).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between DART and TRIR?
A: TRIR (Total Recordable Incident Rate) includes all recordable injuries, while DART only includes those resulting in days away, restricted work, or transfer.

Q2: What is a good DART rate?
A: Rates vary by industry, but lower is better. The average private industry DART rate is around 1.5 (BLS data).

Q3: How is 200,000 hours derived?
A: It represents 100 employees working 40 hours/week for 50 weeks (100 × 40 × 50 = 200,000).

Q4: What time period should be used?
A: Typically calculated annually, but can be used for any period (monthly, quarterly) for trend analysis.

Q5: Are all injuries included in DART?
A: No, only OSHA recordable injuries that result in days away, restricted work, or job transfer.