If you dont want to use ABC analysis then just define one class A.

1. Navigate to cycle count.
Define a new cycle count
Enter the adjustment account
Enter the subinventory
Save the cycle count

2.Enable the auto schdule in serial & schdule tab

3. In adjustments tab , click on classes and manually enter all the items.
Now if u dont want to manually enter the items then do an ABC analysis and put all the items in class A.

4. Navigate to tools -> perform full cycle count.

5. Print the cycle count listing report. Go to the sub-inventory /locator and count the items. Enter the quantities in the cycle count sheet

6. Enter the cycle count entries in oracle

7. Approve the adjustments if required