Ideally, developing a cost model for the 20 plus industrial posts would involve collecting data on many individual cost elements from each and using regression analysis to estimate the coefficients of a cost function.
A cost model involves data collection using regression analysis to estimate coefficients.
Data collection is not necessary.
This was published in the postal and delivery systems.
Peter was sitting at his desk.
Invaders popped up on the frontier after the empire's dissolution.
Man driving a carriage, was wearing a suit
a boy has a bug on his face
Some teachers receive new equipment.