This part of IEC 60068-3 describes a generic process for developing a climatic sequential test programme by sequencing the test methods selected from IEC 60068-2 series. The generic process comprises a systematic approach to the development of a sequential environmental test programme. The process is applicable to electrical product, and can be customized according to specific product requirements and applications. The process is designed for use by both product suppliers and purchasers. The full process is particularly relevant to electrical products, which would include products containing any components or material that have the potential to degrade, as a consequence of environmental exposure.