Final answer:
Debbie can use a version control system to create a separate branch for her work or utilize features like sandboxes to prevent deploying work in progress for the page layout assignment for support users. Additionally, feature toggles or flags could be used to hide unfinished work from end-users until it is ready.
Step-by-step explanation:
To ensure Debbie does not deploy work in progress on the page layout assignment for cases for support users, she can use various approaches depending on her work environment. One common method is to make use of a version control system, where Debbie could branch off from the main codebase to make her updates without affecting the live deployment. If she is using a platform like Salesforce, for example, Debbie could take advantage of sandboxes, where she can work on layouts and configurations in an isolated environment. Only after thorough testing and completion would she merge her changes into the production environment.
Another way could involve feature toggles or feature flags, which allow Debbie to work on new features or layouts while keeping them hidden from end-users until they are ready to be released. This way, even if the work in progress is part of the deployed codebase, it won't impact user experience until it's been fully vetted and activated.