ISO 9001:2015 specifies requirements for a quality management system when an organization:
a) needs to demonstrate its ability to consistently provide products and services that meet customer and applicable statutory and regulatory requirements, and
b) aims to enhance customer satisfaction through the effective application of the system, including processes for improvement of the system and the assurance of conformity to customer and applicable statutory and regulatory requirements.
All the requirements of ISO 9001:2015 are generic and are intended to be applicable to any organization, regardless of its type or size, or the products and services it provides.
OHSAS 18000 is an international occupational health and safety management system specification. OHSAS 18001 is an Occupation Health and Safety Assessment Series for health and safety management systems. It is intended to help an organizations to control occupational health and safety risks. It was devloped in response to widespread demand for a recognized standard against which to be certified and assessed.
ISO 14001:2004 is applicable to any organization that wishes to establish, implement, maintain and improve an environmental management system, to assure itself of conformity with its stated environmental policy, and to demonstrate conformity with ISO 14001:2004 by
a) making a self-determination and self-declaration, or
b) seeking confirmation of its conformance by parties having an interest in the organization, such as customers, or
c) seeking confirmation of its self-declaration by a party external to the organization, or
d) seeking certification/registration of its environmental management system by an external organization.