Question $6(25$ marks$)$

a$)$ Define the term reliability

$(2$ marks$)$

b$)$ A processing operation includes pump and motor assembly, one component is subjected to $4$ failures over a $4$ years period and the assembly is expected to be available for up $16$ hours per day, $5$ days per week, for $52$ weeks each year. The number of failures of the components within a $16,000$ hours period of operation are as follows:

$\backslash$table$[[$Parts damaged,Number of failures$],[$Seal$,1],[$Bearing$,1],[$transmission$,1],[$Rotor cracked,$1]]$

Calculate

i$.$ The mean time between failure.

$(4$ marks$)$

ii$.$ The reliability of the pump

$(4$ marks$)$

c$)$ When using computer$-$based system the work order is very important, give the four stages in the process.

$(4$ marks$)$

d$)$ Identify the four stages in implementing a computer$-$based system.

$(4$ marks$)$

e$)$ State six considerations in the selection a computer$-$based system.

$(7$ marks$)$