What might be a reason for a planned order of quantity 7 being generated against a part with a minimum lot size of 100?

The reason a planned order of quantity 7 could be generated against a part with a minimum lot size of 100 relates directly to the configuration settings in the OrderPolicy table. If a setting is misconfigured or designed to override the minimum quantity specified for a part source, it can allow the system to generate orders that do not adhere to the predefined constraints, such as the minimum lot size.

In scenarios where the system settings make exceptions, such as temporary overrides due to special circumstances or specific configurations intended for unique conditions, the planned order can reflect a quantity below the established minimum. This flexibility might be important in certain production circumstances where smaller order quantities are necessary, despite the standard minimum requirements.

Other considerations in the question, such as the existence of multiple valid part sources or the timing of the order placement, do not inherently affect the generation of orders without respecting the minimum lot size dictated by the product's settings. Similarly, while a default quantity override feature could potentially lead to orders being placed at non-standard quantities, the more direct and relevant cause in this case is the setting within the OrderPolicy table-related configurations, leading to the given answer.