This question hinges on how SOPs are kept reliable through status and version control. A controlled copy is the officially approved version that is locked from edits, with formal versioning, an effective date, and a defined distribution. It is the document you should refer to for day-to-day operations and audits because it represents the approved instructions that everyone follows. An uncontrolled draft, by contrast, is the work-in-progress version circulated to gather feedback. It’s not locked or finalized, may change, and therefore isn’t used to guide actual tasks. That separation is what makes the correct description the best choice: the controlled copy is the approved, edited-and-locked standard, while drafts are temporary, in-flux materials meant for review and improvement. The other options misrepresent how SOPs are used—for example, treating drafts as the operational standard or implying both forms are equally valid.

The designated approvers are the ones who authorize revisions in the SOP change-management process. They have the governance authority to review proposed changes for accuracy, necessity, regulatory and procedural impact, and risk, ensuring the change is properly documented, version-controlled, and traceable before it’s released. End users may request updates and implement changes once approved, but they don’t have formal approval power. The custodian keeps the SOP library and current versions accessible, while the trainer delivers training on the updated procedures after approval.

Having a plan for business continuity means outlining how to keep operations running or resume them quickly when disruptions occur. The best answer includes backup workflows and alternate processes so work can continue even if the primary method is unavailable. It also specifies recovery actions that lay out the exact steps to restore systems and services after an incident. A contact list ensures timely communication with the right people, vendors, and customers, and defining recovery time objectives sets clear targets for how quickly things should be back up, guiding prioritization and resource use. Together these elements create a practical, repeatable approach to minimize downtime and data loss during disruptions. Pausing all activities until resources return isn’t continuity planning; it essentially stops operations. Relying on employees’ personal devices introduces security and control problems and isn’t a formal, approved continuity solution. A single backup site without contact details leaves you with no reliable alternative and no way to coordinate response.

The green power indicator shows the detector is powered and operating normally. When the unit is on and monitoring, the green light stays lit to confirm it’s ready to sense smoke and communicate with the system. It does not mean smoke is present. If the green light isn’t on, it signals a power or fault issue that needs checking. In contrast, an alarm state is typically indicated by a different light color, such as red.