Resources-

We may consider resources from two view points. One, the resources with the manufacturer of the device and two, the resources available with the users of the system, that is, the customers. The resources may be expressed as positive statements of availability or as negative statements of non-availability that can be called the constraints on the design. If we designing a bicycle for Indian villages to be manufactured at the small-scale industries level, the constraints of resources with the manufacturer consist of non-availability of heavy machinery, of highly-skilled labor and of high quality steel. The constraints of resources with the customer or the users may primarily be the lack of skilled repairmen. This may dictate the keeping of design as simple and easy to maintain as possible.