During an operational audit of a chain of pizza delivery stores, an auditor determined that cold pizzas were causing customer dissatisfaction. A review of oven calibration records for the last six months revealed that adjustments were made on over 40 percent of the ovens. Based on this, the auditor:
- Has enough evidence to conclude that improperly functioning ovens are the cause.
- Needs to conduct further inquiries and reviews to determine the impact of the oven variations on the pizza temperature.
- Has enough evidence to recommend the replacement of some of the ovens.
- Must search for another cause since approximately 60 percent of the ovens did not require adjustment.
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