An optical micro-electro-mechanical system switch is disclosed. A constraint propagation algorithm is used to eliminate invalid schedule options based on a first set of constraints in a network of transportation resources. Furthermore, since the fee that an ISP may charge for providing a device management service for multiple companies can be split among the relevant companies, the expense incurred by each company can be reduced. The method yet further can include receiving portions of an image update to the complete view. In one embodiment there is provided carrier means adapted to receive a portion or all of the kit components for storage and handling.