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by gjadi 1115 days ago
Here are the factors proposed by Code Complete (2nd edition):

- baseline: a program, designed by and destined to the same entity (programmer = customer) - a product (3x): designed by an entity destined to another entity (customer). - a system (x3): 2 programs communicating with each other - a system product (x3x3=x9): a system of 2 products