{Click} Solution A is an advanced vertical solution for the production of food and drug products. Among other things, this solution adds a new field to the item table to store the government approval number. This is stored in the ISV layer and in the model MEDICAL. {Click} Solution B is an advanced vertical solution for managing the ongoing service of equipment which is sold to customers. Among other things, this solution adds a new field to the item table for the default service period. This is stored in the ISV layer and in the model SERVICE. You can use models to view the modifications to the item table made by all ISV solutions and easily see where each change originated.