The purpose of SOP comes down to three things a business cannot get any other way. The task is done the same way whoever does it, so the twentieth run matches the first good one. A new hire is trained against a document in a week rather than against a person over a season. And the business can show a customer, auditor or regulator how the task is done, with the records to prove it was. Everything in a procedure's structure serves one of those three. The standard operating procedure template on this site sizes one from your task's steps.
The same result, whoever does it
A task done without a procedure is decided afresh each time by whoever is doing it, and the results vary with the person and the day. The procedure is the decision made once and approved, which is why it has an owner and a version: it is a decision, and decisions get revisited on a date rather than by accident.
Training against a document
Without a procedure, a new hire learns the task by watching someone, and learns that person's habits along with it. With one, they read the current version, sign that they did, and do the task under supervision against the checklist cut from it. The template prints what that training costs across the team in minutes, which is the figure that turns the purpose into a budget.
The evidence
A signed version, read sign-offs and a month of completed checklists are the answer to how do you do this, from a customer's supplier questionnaire, an auditor or a regulator. A business without procedures answers that question in a meeting; one with them answers it from a file. RunbookDesk Pro is that file.
What the purpose rules out
A procedure that serves none of the three is not worth writing: a task done once, a task whose variation is the point, a task nobody will ever be asked to evidence. The purpose is also the test for length: a step that does not help the doer do it the same way, the trainee learn it or the auditor check it, is a step to cut.
Questions people ask about purpose of sop
What is the single most important purpose?
Depends on the business. A product business writes for the same result; a regulated one writes for the evidence; a growing one writes for the training.
Do SOPs slow a business down?
A procedure longer than its task does. The template's reading time against the run time is the check.
Is the template free?
Yes: the standard operating procedure template and the example builder work without an account.