Following are six situations that involve the audit risk model as it is used for planning audit evidence requirements. Numbers are used only to help you understand the relationships among factors in the risk model.

Risk	Situations
\	1	2	3	4	5	6
Acceptable Audit Risk	5%	5%	5%	5%	5%	5%
Inherent Risk	100%	40%	60%	20%	100%	40%
Control Risk	100%	60%	40%	30%	100%	60%
Planned Detection Risk	----	----	----	----	----	----

a. Explain what each of the four risks means.

b. Calculate planned detection risk for each situation

. c. Which situation requires the greatest amount of evidence and which requires the least?

d. Using your knowledge of the relationships among the foregoing factors, state the effect on planned detection risk (increase or decrease) of changing each of the following factors while the other two remain constant:

(1) An increase in acceptable audit risk

(2) An increase in control risk

(3) A decrease in inherent risk

(4) An increase in control risk and a decrease in inherent risk of the same amount