At first glance, software development, or to be more precise, the management of the SDLC (software development lifecycle), may not seem related to ITIL (information technology infrastructure library, or why you need ITIL certification to further a career path that involves software development. However, there are ways that the two approaches are not only compatible but can even be considered two sides of the same coin. The SDLC side is a lifecycle approach to create the product – software. The ITIL side is a lifecycle approach that concentrates on the service. To understand how these two lifecycle approaches integrate, you first have to understand what they each entail.
However, ITIL certification is different. Having an ITIL certification doesn’t make us an ‘expert’ for any specific skill set. As you might already be aware, ITIL is a set of best practices and is descriptive in nature. Hence an ITIL certification isn’t about doing your job, but merely about knowing the ITIL principles. In fact, that’s precisely the reason why AXELOS have now added the ITIL Practitioner level which makes it mandatory for IT folks to apply their theoretical knowledge in practice. 
ITIL 2007 edition (previously known as ITIL Version 3) is an extension of ITIL Version 2 and fully replaced it following the completion of the withdrawal period on 30 June 2011.[21] ITIL 2007 provides a more holistic perspective on the full life cycle of services, covering the entire IT organization and all supporting components needed to deliver services to the customer, whereas ITIL Version 2 focused on specific activities directly related to service delivery and support. Most of the ITIL Version 2 activities remained untouched in 2007, but some significant changes in terminology were introduced in order to facilitate the expansion.