You are a quality manager. On one of your company’s product lines, a report shows that power consumption has risen from the usual level of 35.5 W to a level of 35.9 W. This difference is, without a doubt, statistically significant. However, the line manager has taken no action to investigate the reason for the change on the grounds that (1) the product still conforms to the specification limit of maximum 36.4 W, and (2) he must give priority to several other products in which there are failures to comply with specification. What action do you take?