One of the key issues, therefore, in the events manager's role, is the extent to which facilities and services can be used effectively, given the uniqueness or irregularity (perhaps better to say infrequency) of use. In consequence, events can be expensive to provide. Many items will have to be produced on a one-off basis and cannot be used again. For example, a large banner saying "Happy Wedding Anniversary Anna and Frederick would be a unique item and thus (relatively) expensive to provide. On the other hand, a banner saying 'Happy Anniversary may have a number of potential uses and can be stored.