$[15$ points$]$ You ordered food for delivery from your favorite restaurant$$s website. However, the

food took too long to arrive and you were left feeling disappointed and hungry.

$($a$)$ Identify at least one critical$-$to$-$quality characteristic, one controllable factor and one uncontrollable factor in this online food delivery process.

$($b$)$ Outline the DMAIC steps that you would take and the likely data that you might need to

improve the quality characteristic you identified in part $($a$).$