Calculate the Labor Efficiency Variance based on the following data: Standard time for a job = 500 hours Standard rate = 12 per hour Actual hours worked = 520 hours Actual hours paid = 550 hours at a rate of 13 per hour

A company evaluates its variance analysis data and finds an adverse material price variance alongside a favourable material usage variance. Which of the following reasons could explain these combined variances? (1) Loss of bulk discount on material purchases (2) Excessive waste of material due to poor training (3) Purchase of higher quality material than standard (4) Production delays due to late delivery of material

Which of the following statements best describes the Theory of Constraints?