In any field of mediation, it is difficult to think of a wrong time to mediate. In civil commercial mediation it is often a matter of balancing risk against cost. The earlier in the dispute it is decided to mediate, the less detailed information will be available. So parties have to weigh the possibility of important information becoming available in the future, for example in disclosure, against having less, and perhaps more general, information with the costs being minimal. At the other extreme, full disclosure, witness statements and expert reports are notoriously expensive, and this needs to be weighed against the level of reduced risk that accompanies more information being available.