PH plc operates a modern factory that changes chemicals into fertilizer. Due to the the demand for its product is seasonal, the company expects that there will be an average level of idle time equal to 20% of hours paid. This is incorporated into the companyís standard costs, and the standard labour rate of Rs.6.00 per hour paid is then adjusted accordingly. Any difference among the expected and the original amount of idle time is reported as the ëidle time varianceí and is valued adjusted wage rate.
(a) Measure the idle time variance and the efficiency variance for April.
(b) (i) Using the data provided and your answer to (a) above as appropriate, prepare a percentage variance chart that determine the trend of these variances. (Use graph paper and show both variances on the similar chart.)
(c) Explain shortly the factors that should be considered before deciding to investigate a variance.