The Variable Manual Handling Assessment Chart (V-MAC) tool is for assessing manual handling operations where load weights vary, and the HSE advises that it should be used in conjunction with the MAC tool. It is best suited for order picking and distribution systems (parcel sorting, trailer loading/unloading and parts delivery in manufacturing for example) which can automatically generate the data for importing into V-MAC. The HSE also cautions that significant background knowledge, which can be gained through HSE support pages or training, is needed to use it successfully.