Meaning
Analytical procedures used to monitor and document the variance between planned process parameters and actual execution data provide a record of operational stability. This systematic observation is called deviation tracking, which is used in manufacturing to identify and record any departure from established specifications. It governs both raw material properties and processing conditions during a production run.
The process stops applying once a batch is either formally accepted or rejected through quality control.
Process Stability
Data collected during the pilot phase help establish baseline parameters for volume manufacturing. Applying deviation tracking during early runs answers the readiness question of whether the process is stable enough for high-rate production. It records every instance where temperature or pressure moves outside the defined range, showing the frequency and severity of process variations.
Yield Assessment
Distinguishing between pilot capability and true production yield depends on the continuous analysis of these process variations. If deviation tracking is called early, the cost includes a high volume of false alarms that disrupt the flow of the assembly line. The tracking system logs anomalies to determine if the equipment has the capacity to sustain the required throughput without frequent adjustments.
This analysis ensures that the transition to full production is based on a demonstrated rate of consistency rather than a supplier’s optimistic forecast.
Quality Audit
Documenting these variances is necessary for completing a regulatory or customer quality audit. A deviation log must accompany the final production release document. This log shows that every variance was analyzed and resolved before the goods left the factory floor.