Control the Order of Active Approval Processes Programmatically
Where: This change applies to Lightning Experience and Salesforce Classic in Enterprise, Performance, Unlimited, and Developer editions.
Why: When you have more than one approval process that meets the criteria for an object, you can control the order for evaluating the approval processes. With the processOrder field, you can control the order via Metadata API.
How: To control the order of approval processes via Metadata API, activate them and then in a separate operation use the processOrder field. The maximum value you can define for processOrder is 2,000.