Using the different operational metrics below, please give and explain reasons why sales volume could be decreasing and sales are struggling for restaurants partnered with a food delivery app (Ex: DoorDash). Please also give solutions on how to improve sales.

What operational metrics might be impacting customers orders, and what can be done to improve increasing customer orders?

Feel free to consider operational metrics not included below as well.

\begin{tabular}{l|l} Heading & Definition \\ \hline gross_inflows_usd & Total amount of sales generated \\ \hline basket_size_usd & Average value of each order \\ \hline requests & Number of requests made by eaters \\ \hline completed_orders & Number of orders fully completed \\ \hline unfulfilled_orders & Number of orders not completed \\ \hline erroneous_orders & Numer of orders with a support ticket opened by eaters \\ \hline accept_time_seconds & Time a restaurant takes to accept an order \\ \hline courier_waittime_min & Time between a courier arriving at a restaurant and initiating his delivery \\ \hline e2e_delivery_min & Time between a eater placing and receiving and order (end-to-end time) \\ \hline breakfast_sales_usd & Sales during breakfast \\ \hline lunch_sales_usd & Sales during lunch \\ \hline dinner_sales_usd & Sales during dinner \\ \hline menu_minutes & Total minutes the restaurant's menu should be available to eaters \\ \hline available_to_eaters minutes Actual minutes a restaurant's menu was available to eaters \end{tabular}