What are the benefits of pre-engineered metal buildings?

In some sectors, pre-engineered buildings are also referred to as pre-engineered metal buildings (PEMB). Some of the features that make them invaluable are: competitively prices, quality and innovation assurance, provision for easy future expansion, fastest delivery time & swift construction, low maintenance cost, re-locatable and re-workable, insulated to cater to varying weather conditions and capability to resist seismic forces.