reliability metrics · pwrmetrix is a tool that enables you to turn reliability into a ... thank...
TRANSCRIPT
Reliability Metrics
• What do the reliability indices mean? • And, how do I leverage them to increase my
reliability?
Tony Thomas – NRECA Business and Technology Solutions
Reliability Indices:
• SAIDI: System Average Interruption Duration Index – This is the total duration of interruption for the average customer per
year – Measured in minutes
• CAIDI: Customer Average Interruption Index – This the average time required to restore service. – Measured in minutes
• SAIFI: System Average Frequency Duration Index – Number of outages for the average customer per year – Measured in Each.
1 TechAdvantage 2015
SAIDI = CAIDI X SAIFI
IEEE 1366
• Major Event Days (MED) • SAIDI is modified by MED to better reveal
trends in daily operation that would be hidden by the large statistical effect of major events.
• It’s not the yearly snapshot that’s important. It’s the trend over time that’s important.
1 TechAdvantage 2015
SAIDI trending up over time
This is an example of a SAIDI score that is trending up over time. Note the removal of MED’s reveals the trend that would be hidden in the data.
TechAdvantage 2015 4
Typical SAIDI Trend
TechAdvantage 2015 5
TechAdvantage 2015 6
TechAdvantage 2015 7
TechAdvantage 2015 8
TechAdvantage 2015 9
TechAdvantage 2015 10
TechAdvantage 2015 11
TechAdvantage 2015 12
Evaluate
Goal Setting
Plan Execute
Measure
Process Management Cycle
PwrMetrix is a tool that enables you to turn reliability into a process management opportunity.