If an organization's present suppliers are especially expensive, unreliable, or incapable of meeting the firm's needs for parts, components, assemblies, or raw materials, what strategy is best?

Backward integration.

Explanation:

Backward intergration is the process by which a company either buys or generates internally segments of its supply chain. It involves creation of input that can be used in production process. For example if a company buys up their supplier for a pay input.

So if an organization's present suppliers are especially expensive, unreliable, or incapable of meeting the firm's needs for parts, components, assemblies, or raw materials. The best strategy will be to buy a supplier of the input