$"$In implementing the control process for our new operation, I first established performance standards," said Muriel. "Next, I measured performance. But I$\text{'}$m not sure that my measurement of performance is accurate." Her boss replied, $"$In measuring performance, you can gather performance data from three sources: Furthermore, the data need to be timely." $q,$

$$ written reports, oral reports, and personal observation

client satisfaction surveys, oral reports, and customer observations

written reports, the grapevine, and media reports

competitors' performance data, market analysis, and personal observation

$$ written reports, oral reports, and analysts' statements