Hey there, great question—this is a common point of confusion with GAS quotas! Let me break it down clearly:

"Simultaneous executions" refers to the total number of active script runs across all your Google Apps Script projects under a single Google account, not per individual script. The current standard limit is 30 concurrent executions.

To put it in practical terms:

• If you have 5 different GAS scripts under your account, every active run across all 5 counts toward that 30 limit.
• If one of your scripts is already using 28 concurrent executions, any new runs (from that same script or another one under your account) will be held until some existing runs finish and free up quota space.
• This applies to all execution types—whether they're triggered manually, via time-driven triggers, or web app requests.

Note that Google Workspace accounts may have higher quota limits depending on the plan, but the core rule remains: the quota is tied to your account, not individual scripts.

内容的提问来源于stack exchange，提问作者Malay Thakershi