What is the main reason a list of potential alternative suppliers be maintained?

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Maintaining a list of potential alternative suppliers is mainly done to have backup options in case the primary supplier is out of stock or unavailable due to any other reason. This helps to ensure that the production or operation process does not come to a halt due to lack of supply. Sampling different suppliers or segregating purchasing suppliers may also be a reason to maintain a list, but the primary reason is to have backup options. The option of the primary supplier being more expensive may not necessarily require a list of alternative suppliers but may require negotiation or cost-benefit analysis.

What Is the Main Reason a List of Potential Alternative