A company's reputation is everything. I would focus giving clients quality results even if it took a little extra time to produce these results. That is what the client is paying for. Additionally, it will reduce the stress on employees to accept questionable results, they are less likely to cut corners to meet production goals.
Producing a better quality of product rather than producing a questionable product quickly will always be better for the company in the long run. If the laboratory gets a reputation for producing quality results, the money will follow.