Fractional ownership divides a property into more affordable segments for individuals and also matches an individual's ownership time to their actual usage time. A fractional share gives the owners certain privileges, such as a number of days or weeks when they can use the property. Occasionally, the property is sold after a predetermined time, distributing the relative proceeds back to the owners. A few private owner-groups have developed highly sophisticated usage allocation schemes and other features based on the principle of attempting to get as close as possible to the flexibility of individual ownership, and only compromising this to the minimum extent necessary to accommodate multiple owners. In such schemes, the basic agreement is between the members themselves, whereas in most commercial fractional ownership schemes, the owner's principal relationship is with the property developer and/or promoter of the scheme.