Is Error-FreeSM Possible for Transmission? Human Performance... · and are protected under trade...
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Is Error-FreeSM Possible for Transmission?
Dr. Chong Chiu, Dr. Ray Waldo, Dr. Mostafa Mostafa Mr. Hany Helmy
Performance Improvement International, LLC
760-722-0202 (o), 248-312-8220 (c) [email protected]
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IMPORTANT TRADE SECRET & COPYRIGHT WARNING
This is a proprietary document of Performance Improvement International, PII (formerly known as FPI international), California, U.S.A. The contents of this document shall not be disclosed or taught to a third party and are protected under trade secret laws (Section 757, Restatement of Torts).
This document and each of its pages are copyright protected (under Performance Improvement International, 1997 per U.S. Constitution, Art. I Sec. 8, Clause 8). No part of this book shall be reproduced, copied, or re-compiled in any form without prior written agreement from Performance Improvement International, LLC. Producing any derivative product such as abstracts of information for use in non-PII procedures, literature, training materials, job-site briefings, or reformatting for presentations based on the copyrighted materials, etc., is strictly prohibited by the U.S. federal copyright laws.
Any violation of the copyright and confidentiality will be prosecuted to the fullest extent of the law by PII’s legal counsel: Olins Riviere Coates and Bagula, 2214 Second Avenue, San Diego, CALIFORNIA, 92101, Telephone - (619) 333-2459, Facsimile - (619) 333-2459. Any questions or concerns about the copyright shall be directed to PII c/o Olins Riviere Coates and Bagula, attention Russell Riviere, Esq.
PII Proprietary Document: NERC Conference March 26-28, 2013
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(1) What is Wrong with the Big Picture? (2) What Shall We Do or What Have We Done?
Human Performance in Transmission
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Some System Reliability Standards by FERC/NERC
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(~5%-30%) Faults in Planning Analyses (Next-Day, Seasonal, etc.)
Qualification Tests (~10%-100%)
Planning Failure Model
Independent Review and Verification
(~5%-30%)
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(~0.1%-1.5%) Errors
Review and Verification (~5%-100%)
Operations Failure Model
JIT Risk Reminder
(~5%-100%)
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Loss of Critical Generation or Transmission (~0.0001%-1%)
Regional Operational Intervention (Situational
Awareness) (5%-100%)
Blackout Failure Model
System Self-Recovery
(~1%-5%)
Cross-Region Operational Intervention (Situational
Awareness) (5%-100%)
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Event Rate
Event (Injury) Rate = Probability of Triggering Event*
LOP1 Failure Probability*
LOP2 Failure Probability*
LOP3 Failure Probability*
8
Triggering Event Could be a Consequential Error, an Equipment Failure or a Special Condition
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Thought Provoking Questions
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Question 1
Are we familiar with the LOPs (barriers) established to prevent human error events, including injuries, as well as with those for critical components, such as a transformer bank?
If not, why not?
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Question 2
If we monitor performance and do routine maintenance on critical components, do we do the same for our critical LOPs?
If not, why not?
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Question 3
Do we design the reliability of transmission based on quantitative analysis of LOPs? As such, would we know the important from the unimportant?
If not, why not?
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0
0.5
1
1.5
2
2.5
3
3.5
OE FS EC SIH FE SB VEH PPT SA DB DII EA GFB IB FBR CPN FBE
Number of Barriers
Relative Risk
More Management
Attention is Needed
Management Attention to Various Injuries
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Question 4
We know the definition of “risk”: probability of failure times the consequence of failure.
What is the equivalent term to risk, but on the side of success? Probability of success times the benefit of success.
If we do not know that term, why not?
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Answer: There is no such term
Security? Utility?
Expected Value?
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Question 5
Our workers’ lives are dear to us. As we start the day, do we know where, when, and what fatality or injury will most likely to occur? If yes, have we done anything to mitigate them?
If not, why?
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0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 2 4 6 8 10 12
Probability of Consequential Error % per Day
Mitigation Zone
Probability of Consequential Errors
Number of Error Traps a Worker Encounters
(PII Field Research, International Data, 6,555 events, 1994-2010)
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Question 6
The transmission industry’s outage event rate has not dropped over the past few years, mainly due to various human errors involving the planning process, operational process and execution of tasks. Do we know how to decrease it?
If not, why not?
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Injury Statistics per Year in the USA (2005-2011)
~3.0 million recordable injuries, ~5,000 fatalities (The injury rates and fatality rates essentially remain constant from 2002 and on, considering significant reduction of manufacturing industry workforce in the USA)
Workplaces
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Vehicle – 37% LOF- 16% Fall -13% Harmful Substance – 4.3% Electrocution -3.7% Fire and Explosion – 2.5%
Fatality
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Question 7
To control the flow rate of a pump, we design a control system that regulates the flow through:
• Real-time flow measurement
• Error between the actual measurement and the set-point
• Controller to change valve position and pump speed to reduce error
Human performance is as important as the pump flow in our system. Do we have a human performance control system?
If not, why not?
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Flow Rate Control
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Expectations Human Performance
Standards (ABC, TQA, HEE)
Gap Analysis
Root Cause Analysis
Corrective Actions
Change Management
Performance Monitoring
1. Leading 2. Real Time 3. Lagging
Satisfactory?
Human Performance Control Loop
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Answers to all Questions
We don’t know what we don’t
know.
The optimism bias in the form of complacency prevents some of us from elevating to a higher level of thinking and a relentless pursuit of
advanced knowledge.
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The Error-Free ZoneSM
Unless we can predict it quantitatively, we really don’t know how to improve the system…
Problems can’t be solved by the same level of thinking that
creates them…
Einstein, 1921, 1934
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What’s the New Thinking?
Quantitative Analysis
(>80,000 Lessons
Learned)
Different Error Traps for
Different Jobs
Recognizing Brain
Limitation
Recognizing Importance
of LOPs
•7 Marbles •4 Months Long-Term Memory •4 Hours Working Memory •Human Error Cycles
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A
T
T
E
N
T
I
O
N
F A M I L I A R I T Y
Knowledge-based
Errors
Rule-based
Errors
Skill-based Errors
Low High
Low
High 1:10 activities performed in error
1:1000 activities performed in error
1:100 activities
performed in error
Human Error Types
Rules, Standards, Check List, Written Procedures
Memorization, Practice
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Definition of Errors Type Mode Term Definition
Skill-based Commission Slips During routine and repetitive activities (e.g., driving a vehicle, reading meters, etc.), an unintentional error is made without thought, reason, or judgment. A typical example is: while driving, the driver turns the right turn signal on when making a left turn.
Omission Lapses During routine and repetitive activities (e.g., driving a vehicle, reading meters, etc.), forgetting an action occurs without thought, reason, or judgment. A typical example is: while driving, the driver forgets to turn the right turn signal on when making a right turn.
Rule-Based Intentional Non-compliance Error
The rules, standards, procedures, or policies in question are adequate. However, workers choose to intentionally (with thought, reason, or judgment) disobey the requirements in the policies, standards, procedures or policies.
Non-intentional
Rule Application Error
The rules, standards, procedures, or policies in question are not adequately designed, communicated to, and/or applied to the workers. In essence, they violate the principles of ABC (all-inclusive, bypass resistant, clear) and/or TQA (workers are trained, qualified, being held accountable) for adequacy of rules.
Knowledge-based
Commission Mistakes A decision error made to cause unexpected and negative impact to the organization.
Omission Indecision No decision is made when a decision is needed in a troubled situation, a downward performance trend, an event, or a situation (e.g., routine resource re-allocation, standards change management, etc.) needing decision.
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Eight Human Error Experiential Curves
Skill-Based Rule-Based Knowledge-
Based
Commission Error
1) Unintentional Slips Curve
3) Application Errors Curve
4) Non-compliance Curve
5) Mistakes Curve
Omission Error
2) Forgetting Curve 6) Indecision Curve
Unintentional Intentional
7) Engineering Error Rate Curve 8) Project Failure Rate Curve (FUSESM)
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How to Calculate Human Error Probability per Activity (Error Rate)?
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Simplified Calculation
Error Rate = Nominal Error Rate*
First Order Shaping Factors
Note: For each of three error types, if it is indeterminate about omission or commission error, the average error rate shall be used in error rate calculation
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PII’s Model of Human Errors (Balance of Attention Marbles)
Task Marbles
Attention Marbles Missing Marbles due to Error Traps
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Shaping Factors = Marble Imbalance
Task Marbles – Attention Marbles
Error Rate
0.0
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Make Sure to Place Horse-before-the-Cart
Error-FreeSM Road Map (Preventive + Quantitative)
Event Investigation and Lessons Learned
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Error-FreeSM Transmission Road Map
Error-FreeSM Behavior
Seek Wisdom
Control Risk
Avoid Error Traps
Reflection in Action
Error Trap Mitigation by Supervisors
Time Specific
Activity Specific
Personal Specific
Environment Specific
Error-FreeSM LOPs by Managers
Quantitative
Design Maintain Monitor
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The Error-Free ZoneSM Lessens the Burden
Expected Event Rate Reduction
Items Influence Impact in Event Rate Reduction
Error-FreeSM Behavior (SCARSM)
Reduce probability of triggering events, such as making a calculation error, use of wrong design code or data, or omission of a critical requirement by using job-specific error avoidance techniques.
2X-5X
Error Trap Mitigation (TAPESM)
Reduce both the probability of triggering events and LOP failure rates through mitigating the effects of time pressure, distractions, and inexperience.
1.5X-3X
Effective LOPs Reduce event rates by detecting and correcting planning errors before they cause events through improved review, qualification tests, etc.
5X-10X
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Let us Pause and Think about the 2003 Northeast and 2011
Southwest Blackouts…
2003 Blackout: Software Design Errors, Review Errors, Planning Errors, Decision Errors
2011 Blackout: Operating Error, Verification Errors, Planning Errors
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