Over the last two decades we have seen a growing sophistication in discussing and using the concept of a value chain. In my own experience, this has consisted of the use of more well-developed approaches for understanding and redesigning linear processes especially the use of socio-tehcnical systems design (STS). We practitioners then experimented with non-linear design recognizing the increasing role of knowledge work. Others worked to perfect the value chain concept talking about what to do with the white spaces in between steps and extending the value chain on a global basis. Throughout all of this, the underlying assumption was that of the almost inviolate value chain even as we saw it as being less and less linear.
The challenge I believe we are facing now is what role does the value chain have in a network of providers. Can you have a value proposition without having a value chain? If so, then how is value produced? How do you account for the transformation of goods and services from raw materials to finished output? Does a value chain provide more room for maneuver than a supply chain?
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