job Costing question

hi i m working on jobs costing Anybody help to explain in shortcut or easy way ,

why should i use the following

Calculate Job WIP Value

Post WIP value to G/L

Calculate Job Reconginition and

Post Job Recongnition to G/L

if i dont use what will happen give your valueable suggestions thanks

I would invest in the Jobs and Resources training material. This should all be explained in there.