Discussion-managerial acct

Have you ever worked in a company that utilized activity based costing, standard costing, a Just-In-Time operating environment, or any of the other costing concepts covered in our readings during this module? Describe your experience with any of these managerial philosophies and your opinion on their effectiveness.

I need this to be about 3 paragraphs.  APA style and one reference would be preferred. You can choose one or two cost examples.