How to setup Capacity Planning using Actual Cost method and not to generate accounting variances

How to setup Capacity Planning using Actual Cost method and not to generate accounting variances, Here are the requirements:

What I most need are shop floor management tools that schedule work orders in proper sequence manufacturing and packaging. As we refine the time expected to complete particular jobs, we should be able to take a work order in the schedule and predict when it will be completed.we’ll need the capability to plan the production and packaging departments.

Any ideas?