Of the seven quality principles, the process approach is the one that changes how you actually run the organization. Instead of managing departments and tasks in isolation, you manage the processes that cut across them — and that shift is what produces consistent, predictable results.
What a process actually is
A process turns inputs into outputs through a set of activities, using resources and controls. The output of one process is usually the input of the next — which is why managing them in isolation fails: the handoffs between processes are where quality is most often lost.
The turtle diagram
A common tool for mapping a process is the "turtle diagram," which prompts six questions about any process: what are the inputs and outputs, with what (resources/equipment), with whom (people/competence), how (methods/procedures), and how measured (performance indicators). Answer those and you understand the process well enough to manage it.
Quality usually breaks not inside a step, but in the handoff between two of them. The process approach makes those handoffs visible.
Process owners and measurement
Two things turn a process map into management: a process owner accountable for the process end-to-end (not just their department's slice), and measures of how the process is performing. Without an owner, cross-cutting processes fall between departmental cracks; without measures, you can't tell whether the process is healthy or improving.
PDCA at the process level
The process approach pairs naturally with Plan-Do-Check-Act: plan the process and its objectives, run it, check its performance against the measures, and act to improve. Clause 4.4 of ISO 9001 essentially asks you to do exactly this for the processes of your quality management system and their interactions.
The payoff
Managed as processes, work becomes predictable and improvable; managed as disconnected tasks, it stays dependent on individual heroics. The process approach is how an organization's quality stops being personality-dependent and becomes systemic.
Map, measure, and improve your processes
My ISO 9001 Process Approach course covers process mapping, turtle diagrams, process owners, measurement, and managing the interactions where quality is won or lost.
View the course →Questions
What is the turtle diagram?
A simple template that characterises a process by its inputs, outputs, resources, people, methods, and measures — six prompts that make a process explicit enough to manage.
Which ISO 9001 clause covers the process approach?
Clause 4.4 requires you to determine the processes of your quality management system, their sequence, interactions, and how you'll measure and improve them.