Which Control Would Best Help Achieve the Aim of Correct

Multiple Choice

Which control would best help achieve the aim of correct valuation for purchase transactions entered into a system?

A) Range checks - checking the quantity ordered against acceptable ranges.
B) Validity checks - checking the supplier is listed in our supplier master file.
C) Sequence check - ensuring the purchase order number is the next number in the sequence.
D) Authorisation - getting a manager to approve all purchases.