During your preliminary review of an entity's computer system, you note the following:

a. Purchase orders initiated by line personnel within the manufacturing plant may be authorized and executed bv computer department personnel.

b. Software and data files are maintained in an unlocked filing cabinet in the information systems department. User department personnel are not denied access to the information systems department.

c. Transactions initiated by user departments are usually, but not always, processed, thereby requiring manual processing thereafter.

d. Line personnel sometimes receive weekly paychecks for amounts in excess of normal weekly pay. Overtime is not uncommon, particularly in peak production periods.

e. Transaction files may not be fully posted to updated master files.

Required: 

For each of the above observations, indicate the specific, general, or application control violated and the test(s) most likely to detect errors.