Application Research on the Maintainability Allocation Method of a Certain Shooter Seat

Table 1

The value of maintainability weighting factor.

Weighting factor	Type	kij value	Description
Fault detection and isolation factor, ki1	Automatic	1	Use the computer inside the device to detect the fault
	Semiautomatic	3	Fault location is performed by detecting circuit in manual control machine
	Artificial	5	Detect the detection hole set inside the machine with a portable instrument
	Artificial	10	There is no set detection hole in the machine, so it must be manually traced point by point
Accessibility factor, ki2	Good	1	No need to remove the cover when replacing the failed unit
	Better	2	Quickly remove covers
	Difference	4	Remove the block; tightening on loosening bolt is required to remove barrier and cover
	Very poor	8	In addition to the upper and lower screws, more than two people are required to move the obstruction and cover
Replaceable factor ki3	Plug	1	Replaceable unit is plug-in
	Buckle	2	Replaceable modular module, open the buckle when replacing
	Screw	4	Replace the unit with upper and lower screws
	Welding	6	The replacement shall be welded
Adjustability factor, ki4	Not adjusted	1	No adjustment is required after replacing a failed unit
	Fine-tuning	3	Adjust using in-machine adjustment elements
	Joint tuning	5	Must be joint tuning together with other circuits