The Development Account
The NetSuite development account is a place that is isolated from your production account in which teams can develop solutions. The development account offers a better way to develop NetSuite customizations. NetSuite development accounts never contain production data. This separation of development accounts prevents in-progress customizations from being overwritten by refreshes, as can happen in sandbox accounts, and enables controlled access to sensitive, restricted, and financial data. These lightweight accounts support rapid deployment and testing processes.
The development account is isolated from the production account, but not in the same way as a sandbox account. For example, invoices will be created and email will be sent from this account, so ensure that you use only test data in this account. You shouldn't add real customer information, like contact details, to a development account.
The development account can be selected from the My Roles page.
The best time to begin using development accounts is at the start of a new project. It can be difficult to migrate to a development account if you are already in the middle of a development project in your sandbox. You should finish your existing projects in your sandbox before starting new ones in your development account, so you don't get confused.
You need multiple development accounts for large projects that require separate UAT accounts.
For more information about development accounts, see NetSuite Development Accounts.