In the World of Information Technology & day to day Business on-goings, we the people rely on a lot many processes for the fulfillment of our various activities and transactional associations.

While there are quite numerous processes that are relied on by the various associated entities, in the field of Information T Technology, it is the Software Development Process, which is at the top-most or forms the base of all the associated subsequent Processes.
Software Development Process, as a generality, is referred to the core process used for the analysis, planning/preparation, implementation, testing, support, etc, forms of activities which are used by Dedicated Professionals (whether represented by an organization or a group of Individuals) or Free-Lancers (groups or individual).
Simply put the process that encompasses the software development activity done by any individual or group of Individuals or any organization is loosely referred to as the Software Development Process.

Following are some of the key concepts pertaining to the Software Development Process:
1.) Analysis.
2.) Design.
3.) Software Product Development.
4.) Quality Oriented Feature Testing & Resolution of Issues.
5.) Promotion (Optional)
6.) Installation or Configuration on server (& Integration <-Optional).
7.) Maintainance i.e. Feature Addition & Updation.

The earliest roots of Software Development Process form of Methodology to build software products were born in the 1960s and have been on-going since.

It also provides for various sorts of conventions like SDLC (Software Development Life Cycle), which define various techniques for the purpose of easing development and deployment of Professional & Large Scale Software Products & Instances.

That is it makes the process of Software Development more manageable by defining various states for the Process of Software Development.

Due to its primary roots in computing devices, historically software development has been done on computers and also was deployed on computers.

However, in today's modern world the most common form of communication across distances, the telephone, has received a boost with an era of Smart Phones, i.e. handheld or even wearable phones/devices with the processing power equivalent to some of the yesteryears micro-computer and even supercomputers.

So nowadays while the Software Development Process is still reliant on computers, however, it is more likely than not, that the final target user will be using the developed software product on some hand-held or similar smart device, which means there is absolutely a requirement that the software developer considers the flexibility as such a scenario requires.

So using the Agile Methodology enables the software development process as such that it un-burdens the developer while allowing for the appropriate usage of the end software product on quite a number of various smart devices.

There are also other various methodologies pertaining to the Software Development Process, like Waterfall, Spiral Development, prototyping, Incremental & Iterative, Rapid Application Development & Extreme Programming, all such methodologies are used on a use case basis by the team or entity doing the development based on consideration of respective advantages, as such.