User experience (UX) is the way a person feels about using a product, system or service. User experience highlights the experiential, affective, meaningful and valuable aspects of human-computer interaction and product ownership, but it also includes a person’s perceptions of the practical aspects such as utility, ease of use and efficiency of the system. User experience is subjective in nature, because it is about an individual’s feelings and thoughts about the system. User experience is dynamic, because it changes over time as the circumstances change.
User Experience Design (UXD or UED) is a broad term used to explain all aspects of a person’s experience with the system including the interface, graphics, industrial design, physical interaction, and the manual.  It is also referring to the application of user-centered design practices to generate cohesive, predictive and desirable designs based on holistic consideration of users’ experience. In most cases, User experience design fully encompasses traditional Human-Computer Interaction (HCI) design and extends it by addressing all aspects of a product or service as perceived by users. 
“People often think that [UX design] is a way to make products that suck into products that don’t suck by dedicating resources to the product’s design,” says Chris Fahey, founding partner and principal of Behavior. Making stuff easy and intuitive is far from our only goal. In order to get people to change their behavior, we need to create stuff they want to use, too.”
“User experience isn’t just the responsibility of a department or a person,” says Livia Labate, principal of information architecture and user experience at Comcast Interactive Media. “That compartmentalist view of UX is evidence that it is not part of the organizational culture and hints to teams not having a common goal or vision for the experience they should deliver collectively.”
I am an experienced and creative user experience professional with a proven record in UX leadership, strategy, people management and innovation. I have been responsible for the user experience and design of various web application platforms and custom web and mobile applications. UX is no longer the phase that happens if there is budget left over, but is part of every step of the project process.