How to make component Item as Critical Component for creating Bill of Resources

We are doing a Proof of Concept on Bill of Resources referring to below Oracle documentation.

https://docs.oracle.com/en/cloud/saas/supply-chain-and-manufacturing/23d/fascp/create-a-bill-of-resources.html#u30119626

We are stuck at the section where an Item/component is to be made Critical.

Could you please answer with steps for below asks.

1. How to make an Item/component Critical via Work Definition
2. How to make an Item/Component critical via Plan Inputs page