Читать книгу Maintaining Mission Critical Systems in a 24/7 Environment - Peter M. Curtis - Страница 19

Change Management is a process for managing and communicating change across relevant functions and business units to ensure and deliver integration of procedures and processes. Note that during emergency situations, established emergency response and escalation procedures shall be followed.

When work is contemplated for accomplishment within the critical environment, ranging from certain simple or routine cleaning and inspection tasks to very complex and detailed preventive maintenance, corrective maintenance or construction efforts, it is essential that an orderly and thorough approach to work planning and execution be undertaken. In every instance where work is planned in the critical environment, all departments must ensure that risk to company operations is thoroughly assessed and that appropriate risk mitigation is in place while the work is performed.

The level of detail required in a MOP (Method of Procedure) shall be correlated to the complexity of the work and magnitude of the potential risk. Relatively complex or high‐risk work shall be meticulously detailed in the MOP. The detail required for less complex work would not necessarily be as extensive. The bottom line: a properly developed, reviewed, and approved MOP will result in reduced risk to business operations. Required Change Request Information includes:

 Who is doing the work?

 What systems will be affected?

 Which areas of the building will be affected?

 Is there redundancy for the system being disrupted?

 Detailed procedures for the proposed task.

 Is assistance needed from other Lines of Business?

 What hardware will be moved, added, or changed?

 How long is the task duration?If an outage is required:

 How long will power be out?

 Are there any critical points during the process (High Risk) that can be identified?

 Will those systems be protected by UPS, generators, or other redundancy?

 What kind of backup systems are available if a problem arises?

 Will utility power be taken down?

 Are other feeds to the building affected?

 If redundancy is to be reduced, what redundancy will be lost, and for how long?