Today, it is hardly necessary to emphasize the fact particularly that the successful existence of the enterprise as an economic unit is no longer so self-evident as it has been in former years. The achievement of commensurate profits, maintaining the substance of business or in extreme cases even the survival of the enterprise : all these are being endangered from various directions. In other words, the economic success of business in its widest sense is being threatened (1st diagram), from outside sources and from within. The threats from outside sources come through the growing complexity of our environment and of market conditions. Furthermore there are disrupting incidents caused through force majeure or by the behaviour of third parties. The threat from within is to be found either in the structure of business or in behavioural patterns. Here too there are disrupting events such as human error or technical failure, or activities on the part of employees against the company.