A global retailer has received customer complaints because items that are advertised sell out tooquickly.

The best tool to identify the root causes, dependencies, and opportunities for improvement in a situation where items that are advertised sell out tooquickly is stakeholder interviews, as this helps gather insights and feedback from different perspectives and roles involved in the marketing and fulfillment processes. A service blueprint or a journey map may not be able to diagnose the problem without first understanding the stakeholder needs and expectations.