] In order for the crew of the ISS to increase from a size
] of 3 crew members to a size of 4 - 7 crew members,
] additional crew habitability equipment (CHE) is required
] onboard the ISS. CHE includes: Crew Quarters, Crew
] Galley, Wardroom Table, Waste and Hygiene Compartment,
] and Waste Collection System.
]
]
]
]
] These items are briefly described below. All items will
] have operating lifetimes of 15 years. It is expected that
] all items will fit within and utilize an International
] Standard Payload Rack (ISPR) location. The ISPR locations
] to be used may be located either in Node 3 or in the US
] Laboratory Destiny. (Information about the dimensions and
] characteristics of an ISPR location is contained in Part
] D.) The equipment will allow for periodic inspections,
] preventative or corrective maintenance, restoration to
] original performance, and replacement of components. All
] items will be transported to the ISS using the Space
] Shuttle and must withstand the launch environments.

To paraphrase ... "Let's Grow."

NASA Request for Information: Provision of Crew Habitability Equipment for International Space Station | SpaceRef - Your Space Reference