Typically, business domain experts create information flexiblity using tools such as Excel files and Access databases. They are usually small single task silo applications which often expand into multi task applications, sometimes into mission critical systems. They exist because the business users need the flexibility to change business processes at a speed which traditional database applications cannot manage.
Mission critical centralised systems are the huge and expensive systems often refered to as ERP systems. ERP systems are superbly controlled but they tend to lack agility, which is why the business adds agility to the information mix. Agile Clould is the perfect compliment to the ERP as it is designed to meet the control of the Mission Critical while providing the agility demanded by the business.