A circumstance in which a firm has combined processes of management of supply chain (for example Six Sigma and ISO 9000 or Agile) results in a process that is difficult for a competitor to copy or substitute for, because it would be difficult to articulate and difficult replicate precisely how the systems are combined. This situation is described by what term?
a. Social Complexity
b. Isolating Mechanism
c. Resource Immobility
d. Value Chain