Workflow Automation
The reason most SOPs fail is not the format. It is not the length. It is that they were written for the person who already knows how to do the task, not for the person who needs to learn it. An SOP written for an expert reads like a reminder list. An SOP written for a newcomer reads like a process.
Write for the most likely failure
Before you write a single step, ask: what is the most common mistake someone makes in this process? That mistake tells you where the SOP needs the most detail. Most SOPs over-document the easy parts and under-document the hard parts because the writer finds the hard parts obvious.
One action per step
Each numbered step should describe exactly one physical action. "Review and approve the invoice" is two actions — reviewing and approving. Split them. The test: can you check this step off a list with a single physical movement? If yes, it is one step. If no, split it.
Name the output, not just the action
Most SOPs describe what to do but not what done looks like. "Send the client update" tells someone what to do. "Send the client update email using the template in [location] — the subject line should include the project name and date" tells them what done looks like. The second version catches errors the first one misses.
Test it before publishing
Hand the SOP to someone who has never done the task. Watch them follow it. Do not help them. Every place they pause, ask a question, or make a mistake is a place the SOP needs more clarity. This test takes 30 minutes and will improve the SOP more than any amount of self-editing.