This is MOST true when $$acquiring$$ an HRIS:

a$)$ If my company has $$unique$$ business needs and I have very little time available, I must go for an $$in house$$ HRIS

b$)$ If my company has $$standard$$ business needs and I have sufficient time $($no hurry$),$ I must go for an $$in house$$ HRIS

c$)$ If my company has $$unique$$ business needs and I have sufficient time available $($no hurry$),$ I must go for a COTS package

d$)$ If my company has $$standard$$ business needs and I have very little time available, I must go for a COTS package