And they know what it takes to present a challenge that only the complete player at his best can deal with.

A lack of security staff could present a challenge for a store with an upmarket jewellery department as well as thousands of other expensive items.

But also make the point that all new experiences present a challenge.

However, paying for these projects may present a challenge because emerging markets lack the mature debt and equity capital markets.

Files that are actively being updated can be thought of as live and present a challenge to back up.