An SOP and a checklist can support the same workflow, but they serve different documentation roles. The SOP explains the approved process and context; the checklist helps verify that defined items have been completed or reviewed.
SOP: the controlled process reference
An SOP typically explains scope, responsibilities, resources, sequence, safety references, records and document-control information for a recurring activity.
Checklist: a verification aid
A checklist is usually shorter. It can prompt users to confirm that important items, conditions or steps have been addressed during or after the work.
The level of detail is different
An SOP carries the fuller procedure and context. A checklist normally does not contain enough information to replace the procedure, training or manufacturer documentation.
They can be used together
A controlled SOP can reference a checklist as a supporting form. The checklist can then provide evidence that key points were reviewed without duplicating the entire SOP.
Both still need document control
Where checklists are part of a formal quality or safety system, version control and clear linkage to the active SOP help prevent outdated forms from being used.
Practical takeaway
The SOP tells the organization how the approved process is defined; the checklist helps confirm that required points were addressed. One should not automatically be treated as a substitute for the other.
