Demand Flow companies should make every effort to design parts that are easily produced. They should select standardized components, making sure to eliminate variances between supplier specifications and manufacturer requirements. Design engineering should try to use existing preferred components wherever possible.

Suppliers should participate in part selection and design. In many respects, no one knows better how to select components and meet specifications or is better qualified for recommending modifications than the supplier. Knowledgeable design engineers and procurement buyers understand that suppliers are often the best source of expertise in component selection. Excellent partnerships with key suppliers benefit both partners and often reduce sourcing costs. The world-class manufacturer seeks a consistent approach to standardizing and meeting specifications for the material used in all phases of the design cycle and the procurement process.