• The supply chain refers to the network of plants and vendors that supply raw material, components, and services to another.

  • Because of the dependency on outside suppliers, one approach to SCM is to establish safety lead times based on purchasing time and balanced to account for inventory costs.

  • The amount of safety lead time needed increases when we have more components externally supplied.

  • Reliable suppliers are extremely important to efficient operation of an assembly system that involves multiple purchased parts.

  • Having fewer vendors providing multiple parts might produce better on-time performance than having many vendors providing single parts

    • Purchases become a larger percentage, and therefore a higher-priority piece of the supplier’s business.
    • Easier to keep track of suppliers if there are fewer of them.
  • Since delivery times for different parts may vary even with the same supplier, it makes sense to schedule them differently.

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