We are delighted to bring out this Special Issue on Reliability and Optimization of International Journal of Systems Assurance Engineering and Management. This issue contains select invited/presented papers during the 6th International Conference on Quality, Reliability, Infocom Technology and Technology Management—Trends & Future Directions (ICQRITITM) held on Nov 26–28, 2012 at University of Delhi, Delhi, India by various experts in the field.

This issue covers various areas of importance such as Software Reliability, Optimization, Maintenance, ERP Success Factors, Complexity, Multi Attribute Utility Theory and Multi Up-gradations. The papers provide a glimpse of the state of art in the subject.

The editors are grateful to various authors who have made significant contributions and presented their papers in the ICQRITITM 2012. The editors are grateful to several reviewers for their comments and suggestions which helped in improving the quality of the papers in this special issue.

We hope that this issue will prove to be great success with the academia, researchers and engineers in the areas of Reliability and Optimization.