Absolutely. When you create a Tumult account, you're creating it for a specific organization.
You can add as many users as you want to that organization (all free for the trial period, then $10 each per month after that).
Users can have different permission levels too, so you can control what everyone in your organization is capable of doing in Tumult.
When you're creating a new organization, you do need an email account. Also any account admins (any users with billing management permissions) need an email account.
However, normal users don't need an email. We know that not everyone in manufacturing is provided with an email account, so you can setup users to login with a username, no email required.
We designed Tumult to track the production of complicated, multi-tiered part assembles.
When your engineers are adding manufacturing operations to a part, they can also detail the sub-component parts that will be assembled during that operation.
Sub-components can be sourced from stock, purchased from suppliers, or produced in house. When you select "production" as the source for a sub-component, you can track its progress through engineering and manufacturing just like you would with any other part.
Yep, when you're creating a new job, you can easily add an existing part to it.
Absolutely, we were designed exactly for that. Our sweet spot is helping companies with a high variety, low volume product mix keep on top of production.