Definition
A layered review mechanism of key processes at different levels of management, on a frequency basis.
In detail
Layered Process Audit (LPA) is a mechanism where different management levels audit key processes at defined frequencies. It addresses the limited coverage of single-level audits and delayed problem detection by having senior, middle, and frontline management focus on different execution aspects, ensuring standard work is consistently followed. Unlike general quality audits, LPA emphasizes audit frequency and level differentiation rather than one-time comprehensive checks. Its outputs typically include audit records, issue lists, and corrective action tracking sheets.
Example in practice
When a factory experiences quality fluctuations and suspects that standard work is not being followed, layered process audits can be initiated. For example, on an assembly line with rising defect rates, management organizes team leaders to audit key workstations daily, supervisors weekly, and the plant manager monthly. Through different levels of perspective, it is discovered that operators are not following standard work, and training and corrective actions are implemented. After the audits, a problem list is formed, follow-up is tracked, and defect rates are controlled.