Solution Reliability Evaluation Of Engineering Systems By Roy Billinton And [new] -

| Index Category | Specific Index | Definition (Billinton’s phrasing) | | :--- | :--- | :--- | | | LOLP | Probability that the load will exceed available capacity at a given time. | | Frequency | LOLE | Expected number of days (or hours) per year that a deficiency exists. | | Duration | LOLD | Average duration of each deficiency event. | | Energy | EENS | Expected Energy Not Supplied (in MWh). Used for economic costing of failures. | | Customer | SAIFI | System Average Interruption Frequency Index (customer-centric). | | Customer | CAIDI | Customer Average Interruption Duration Index (restoration speed). |

"Reliability Evaluation of Engineering Systems: Concepts and Techniques by Roy Billinton and Kumar Prajapati" | Index Category | Specific Index | Definition

While the exact phrase "solution reliability evaluation of engineering systems by Roy Billinton and" points toward his foundational textbook "Reliability Evaluation of Engineering Systems: Concepts and Techniques" (co-authored with Ronald N. Allan), the core methodology is universally known as . | | Energy | EENS | Expected Energy Not Supplied (in MWh)

Consider a standby system with two identical components (A – active, B – standby) and a switch whose failure probability is time-dependent. The conventional solution for system reliability, ( R_s(t) ), is often presented as: | | Customer | CAIDI | Customer Average

Start with: Reliability Evaluation of Engineering Systems (Billinton & Allan, 1992) – Chapter 3 (Basic Probability) and Chapter 7 (Power System Applications). Yes, it has math. But now you know why the math matters.