A project manager is analyzing the budget variance for two different departments. The variance for Department A is denoted by $x$ and the variance for Department B is denoted by $y$. The manager's report states that the absolute values of these variances are equal, which is expressed as the equation $|x| = |y|$. According to the property of equations with two absolute values, what must be true about the relationship between the actual variances $x$ and $y$?

A quality control auditor is reviewing a new training manual for machine calibration. The manual states: 'When comparing two different machine calibrations, if the absolute value of calibration error $x$ equals the absolute value of calibration error $y$, mathematically expressed as $|x| = |y|$, then it must always be true that the errors are strictly identical ($x = y$).' Based on the property of equations with two absolute values, is the statement in the training manual true or false?

A quality control engineer is writing a test script to compare the measurement results from two different sensors, $x$ and $y$. The script relies on the absolute value equation $|x| = |y|$. Match each mathematical expression with the specific logical scenario it represents in the engineer's script.

Comparison of Measurement Deviations

In a manufacturing quality control process, a technician measures the thickness deviation of two different components. The technician finds that the absolute value of the deviation for Component A, $|d_A|$, is equal to the absolute value of the deviation for Component B, $|d_B|$. According to the property of equations with two absolute values, this result implies that the actual deviations $d_A$ and $d_B$ are either exactly equal or they are exact ____.