The important criteria for selecting a good ceiling system are: Acoustic performance: A ceiling should have good acoustics. It should enhance required sound, while eliminating or reducing unwanted sound. Light efficiency: A ceiling that reflects and diffuses light well reduces need for artificial lighting. The result is improved energy efficiency and a better working environment. Accessibility and service management: An important function of a suspended ceiling is concealing the plumbing, the air-conditioning system and electrical wiring. A good ceiling system also enables ease of access to such ducts and wires. Other functional parameters: Apart from these parameters, fire safety, moisture resistance, ease in cleaning, load-bearing capacity, installation and environment friendliness are important.