Rewash Rate Methodology

Scenario 1: Failed Rewash Event

Sequence Summary:

1. Scan 1 – Fail

2. Scan 2 – Fail (within 2 minutes of Scan 1) → still part of the same event

3. Scan 3 – Fail (within 2 minutes of  Scan 2) → still part of same event

4. Scan 4 – Pass (but over 2 minutes from Scan 3) → treated as new event

What Happens:

• Scans 1, 2 & 3: All failed scans and treated as the same event, given they all occured within 2 minutes of each other.  Each fail resets the two minute clock

• Scan 4: Passes, but it's over 2 minutes from Scan 3 → This means that scan four is treated as a new event; the previous chain of fails are one event and the scan four is another. 

🧼 Outcome:

• 3 Failed Events, each marked as “NO” (unsuccessful rewash)

• 1 Independent Pass, marked as a single verified clean handwash

🔍 Teaching Point:

Even if a clean handwash happens, timing matters. If more than 2 minutes pass, previous fails cannot be remediated. Each event stands alone.

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✅ Scenario 2: Succesful Rewash

Sequence Summary:

1. Scan 1 – Fail

2. Scan 2 – Fail (within 2 minutes)

3. Scan 3 – Fail (still within 2 minutes)

4. Scan 4 – Pass (within 2 minutes of Scan 3)

What Happens:

• All scans remain within the 2-minute rule, forming a single contamination event

• The clean handwash at Scan 4 successfully remediates all prior failed scans

🧼 Outcome:

• 4/4 Rewash Success Rate

• All scans marked “YES” for successful remediation

🔍 Teaching Point:

As long as employees keep scanning within 2-minute intervals, a successful clean handwash at the end of the event will "correct" earlier fails within that contamination event.

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✅ Final Takeaways for Training