Abstract: A method to enable online collaboration to rank and review goods and services wherein, at a controller: all of the goods and services are classified according to a hierarchical structure of categories and sub-categories, each of the goods and services being able to be in more than one of the categories and sub-categories. Properties are allocated to the goods and services according to each of the categories and sub-categories. Rankings are received in accordance with defined criteria for each of the goods and services relative to others of the goods and services, the rankings being according to properties of the goods and services and the categories and sub-categories. Data is provided in relation to the rankings, the data being a number of rankings for each property of each of the goods and services in each of the categories and sub-categories according to the defined criteria. A corresponding apparatus is disclosed.