Match the following terms to the correct definition.

$1$

A production environment where a good or service can be put together, from standard components, after receipt of the customer order.

$3$

A production environment where products are made after receipt of the customer order. Key components typically include a combination of standard items and custom items.

$4$

A production approach where customer specifications require unique design, customization, or new purchased materials.

$2$

A production environment where products can be finished before receipt of customer orders. Those orders are typically filled by existing inventory.

$1.$

ATO $($Assemble$-$to$-$Order

$2.$

MTS $($Make$-$to$-$Stock$)$

$3.$

MTO $($Make$-$to$-$Order$)$

$4.$

ETO $($Engineer$-$to$-$Order$)$