A New System Reliability Optimization Model Based on Swapping Existing Components

Table 3

All possible swapping cases for type 1 component.

Number of swaps	Swapping cases	Number of cases
0	[-]	1
1	[1-2], [1–5], [1–7], [2–5], [2–7], [5–7],	12
	[2-1], [5-1], [7-1], [5-2], [7-2], [7-5]
2	[1-2, 5–7], [1–7, 5-2], [1-5, 2–7], [2-1, 5–7], [7-1, 5-2], [5-1, 2–7], [1-2, 7-5], [1–7, 2–5], [1–5, 7-2], [2-1, 7–5], [7-1, 2–5], [5-1, 7-2]	12