information one important piece of information is the loading and packing time for each item a determination can be made of how long it will take to package the item into its box and put it on the truck for instance for an icon u2122 lamp it may be known that it will take one hour and ten minutes to package the lamp and place it in the truck by knowing how many people are doing the moving step 450 can calculate an approximate time of loading to enable determination when the loading should begin other data can be entered as part of the data file including the distance to the next show and other such information which determines a total time of transport moreover unpacking information can be determined to decide how long it will take to unpack the truck all of this information can be correlated by the computer into a form which determines the latest possible time when packing could begin another feature is the formation of production information labels indicating for example the area to which the package will be unloaded fig5 shows a typical virtual image of a stage and the lighting equipment the stage 500 has a point of reference x y z the light fixtures are located about the stage.