Costing analysist

We are a Wooden outdoor Furniture, wooden, stainless steel & aluminium umbrella manufacture based in Boksburg JHB, South Africa. We are looking for a freelancer who must be able to visit our production site. The project will involve a compete look at our costing process, analysis the methods and suggest a costing model to adopt, and implement this model, with in house help. You must have worked with Navision software and have proven projects that you can supply to demostrate this. The project will propably take 3 months, so bear this in mind when quoting. We are a small to medium sized company.