Because management considered a longer time window for recovery in plan B, downtime costs included in the plan are likely to be higher. Because the recovery time for plan B is longer, resumption and recovery costs can be expected to be lower. Walk-through costs are not a part of disaster recovery. It seems to me that if downtime costs were higher you would not want to be down long so plan A will be the choice. Since management chose the longer timeframe the cost of recovery must be higher one. Replcing and installing thebsystems. Edit: Please identify the resource used to develop & answer this question. This is another question that supports the author's resource(s) should be posted along with the question.