Update frequently using Update But Do Not Check In, which lets you continue working where you left off.
Update and Check In Model at least weekly. If you do not check in the model at regular intervals, a check in error occur.
If you check out a subset with Delete protection for a scoping object, delete the object quickly and check the subset back in.
Check in the subset promptly after completing your task to make objects you have created in a subset available to others and relinquish control of an object to whoever need it.
Change the checkout user ID to allow a specific individual or group to continue working on the subset.
