Wastewater Treatment Plant Operator Exam

1
Wastewater Treatment Plant Operator Exam

• Setting Performance Standards With The
• Modified Angoff Procedure

2
Overview

• Purpose of this Meeting
• Wastewater Treatment Plant KSAs
• Minimum Qualifications
• Procedures

3
Wastewater Treatment Plant KSAs

• Basic Math
• Basic Science
• Safety
• Plant Operation

4
Minimum Qualifications

• Public Safety Concerns
• Cost of Incompetence
• Limitations of Liability
• The Minimally Qualified Operator

5
Procedures

• Review the Test
• Rate Items
• Discuss Ratings
• Rate Items Again
• Set Cut Score

6
Review The TestBasics

• Focus on Practical Application
• Based on Training Manual
• Developed by External Agency
• Reviewed by Operators
• Tried Out by Operators
• Final Form Approved by Chief Engineers

7
Review The Test Items by Type and Content
8
Rate Items

• Consider the KSAs needed to answer each item
  correctly.
• Think of the minimally qualified operator.
  What is the likelihood that he or she would
  answer this item correctly?
• Enter that percentage (0 to 99) on the form.

9
Rate ItemsComplete the Form Round 1
Judge 1
10
Discuss Ratings

• Examine Round 1 Ratings by Judge and Item

11
Discuss Ratings

• Examine Range of Cut Scores

Pass
Cut 39 58.8 Pass
12
Rate Items Again(Round 2)

• Consider Round 1 Discussion
• Think of the minimally qualified operator.
  What is the likelihood that he or she would
  answer this item correctly (0 to 99)?
• Enter that percentage on the form.

13
Set Cut Scores

• Verify Results of Round 2.
• Forward Results to Board.
• Board Accepts/Rejects Cut.