A second set of necessary relationships concern the complex chains of supply and demand
that bind different companies together. Thus,in realist terms, rural manufacturers need to be considered as part of production as a whole: the outputs from one industry forming the inputs of another. Supply-chains constitute groups or networks of necessary relationships and practices which connect customers and suppliers,linking companies and economies over space.Once again, decision-makers may be imbued with both causal powers and liabilities as a consequence of their function within supplychains.In many cases, power relationships between customers and suppliers will be disproportionately
weighted in favour of the former, with small, independent subcontractors unable to exert a significant influence over the demands of their customers. In some situations,
however, this may not be the case. For example,