You need a plan B to ensure minor unexpected events do not become major crises.
Start your plan by looking closely at what you need to do to deliver a minimum level of service. Your goal is to maintain business operations when disaster hits. Include everyone’s needs in your planning. Identify what needs to be done, when and who is to do.
Keep your plan simple and up to date. Communicate and provide regular training so that all involved knows what to expect. Keep only current plan and copies off-site that is easily accessible when needed.
It costs money and time to make a contigency plan, but without a proper one could cost you a lot more when disaster strikes.