Method	Advantages	Disadvantages
	Easy to quantify as inputs known	Only at specific time, small error in P
	Solid input for some products, future extrapolation has low error	Demands future extrapolation and resultant errors for all inputs
	Provides total value with low error	Demands future extrapolation, difficult quantification of secondary benefits
	Easy calculated precise value for single company	Only useful for single company
	N_D available and generalized cost assumptions tolerable	Uses P and associated errors, assumes all firms have similar costs and values, demands future extrapolation
	Captures value throughout time	P errors, Firm value/costs errors, demands future extrapolation
	Captures total value with solid foundation for direct costs	P errors, Firm value/costs errors, Demands future extrapolation, quantification of secondary benefits difficult
	Easy to calculate	Only true if mass-scale distributed manufacturing established at single time, misses all secondary benefits
	Relatively easy to calculate	Only valid if mass-scale distributed manufacturing established, demands future extrapolation and resultant errors
	Approaching the optimal deployment and thus value of OSH	Only valid if mass-scale distributed manufacturing established, demands future extrapolation, estimation of secondary benefits and resultant errors