Answer:
they need an effective DR (disaster recovery) plan
Step-by-step explanation:
Rather than wait until disasters disrupt important IT infrastructures, both companies need to have a carefully written set of procedures that would be implemented in the event of a disaster.
For example, in company A (Emc) the backup generator couldn't perform as expected. A disaster recovery plan would could include getting two generators which could be used in the case of emergencies. While in company B (Structure Tone) employees could not access the VPN which resulted in problems. Perhaps allowing remote access connection that doesn't require VPN may help out in the case of emergencies.