How to Draw a Process Map: A Practical Five-step Method

A process map is a one-page view of the work a business does to bring its product or service to the customer, and the relationships between that work. It is the heart of the process approach in ISO 9001, but in most businesses it is drawn, hung on a wall and forgotten. It is possible to turn it into a working tool.

1. Start from the customer

First write down what the customer expects: on-time delivery, the right product, a fair price, fast support. At the far left of the map is the customer request and at the far right customer satisfaction; every step between serves these two end points.

2. Separate core, support and management processes

• Core processes: sales, planning, production/service, delivery
• Support processes: purchasing, maintenance, human resources, IT
• Management processes: strategy, objectives, internal audit, management review

A total of 8 to 12 processes is enough for most businesses; if you see more than 20 you have gone into too much detail.

3. Assign an owner to each process

The process owner is the person who follows the objective and indicators. "Everyone owns it" means "nobody owns it". The process owner passes the process's resource needs to management and proposes improvements.

4. Define input, output and indicator

A process card is one page: who, for what, with which input, what output and which indicator it measures. For example for the "Purchasing" process the input is a purchase request and the output an approved order; the indicators are lead time and supplier nonconformity rate.

5. Show the interactions

Draw arrows only where there is a meaningful flow of information or material. Every arrow is a handover and carries a chance of error. By counting arrows you can identify the riskiest handovers.

Keeping the map alive

Discuss the map once a year at the management review; if the indicators do not meet the objective, the process must change. The map is used not only for the audit but also so that employees can see their own work. In our workshop you can learn to draw your own process practically.

Example: an order-to-delivery process card

Input: customer order. Output: delivered product and invoice. Owner: sales operations manager. Indicators: on-time delivery rate (target 95%), order entry errors (target below 1%). Risks: stock shortage, courier delay. Opportunities: online order tracking. This single page describes the whole process for both employees and the auditor.

Common mistakes

Leaving the map to a consultant without sharing it with employees, exaggerating the number of processes, writing targets without monitoring indicators and not correcting the gap between the map and real practice for years are the most common mistakes. Drawing the map together with employees prevents most of them.