How do you plan your Data Centre survive the next 20 Years with minimum downtime and less cost just by following the minimum requirements?

A data center is a facility used to house computer systems and associated components, such as telecommunications and storage systems. It generally includes redundant or backup power supplies, redundant data communications connections, environmental controls (e.g.,Power, Air conditioning, Fire suppression) and various security devices. And a Good Data Center is always built by keeping in mind a minimum time frame of twenty years. This can be achieved and billions of Dhirams can be saved only by *