I strongly suggest you do the operations research to map the flow of material, money and information in your client’s business. An accounting package is a model of the client’s financial activities. If it is a map of something else, there will be all sorts of problems because you will be delivering a square peg your client will have to hammer into their round hole.I strongly suggest you do the operations research to map the flow of material, money and information in your client’s business. An accounting package is a model of the client’s financial activities. If it is a map of something else, there will be all sorts of problems because you will be delivering a square peg your client will have to hammer into their round hole.