Masters

Hi,
Doing Ph.D in any stream is a very tough decision because this requires a lot of patience, consistency, time and money also. However, it depends upon own caliber and interest and if you think you can. Now, coming to the point, in my opinion, you have already taken the PG in manufacturing engineering. So, now, the time is to apply your knowledge/ qualifications in real market. For this, you have to search a suitable jobs first because finding a suitable job in today's competitive market is also a big challenge. For this, you may start your preparation for Civil services, IES Banking, Railways and government PSUs etc. Ph.D can also be done within the jobs also by availing higher study leaves.
2. The eligibility criteria of most of the Universities/ Colleges for Ph.D. is almost same because all are requires Graduation/PG with 50-60% marks along with a valid GATE score.
Good Luck.

There are two types of Masters degrees:
Research Masters, which include a thesis or research portfolio of at least 90 points
Taught Masters, which are usually comprised of taught courses, but may include a dissertation or research project of less than 90 points. Admission to a 120 point Master's degree
Normally this requires a completed Bachelor honors degree or postgraduate Diploma from New Zealand, or an acceptable equivalent postgraduate qualification from a recognized university (or similar) overseas. For Masters Supervisors and research projects, see Find a Thesis, the research web pages for your area of interest or contact the postgraduate adviser for your faculty. Admission to a 180 point Master's degree
This normally requires a completed Bachelor degree or postgraduate certificate from New Zealand, or an acceptable equivalent qualification from a recognised university (or similar) overseas. Previous work experience may be taken into account. Admission to a 240 point Master's degree
This normally requires a completed Bachelor degree from New Zealand, or an acceptable equivalent qualification from a recognized university (or similar) overseas. Previous work experience may be taken into account. Supplementary requirements
Many programmes such as architecture, fine arts, music, urban design or writing, require supplementary evidence of creative ability (e.g, a portfolio or audition).

I feel sorry to tell you that NIFT does not provide any course or training programme related to Interior Designing. But, having said that, there are other exams that you can prepare for to pursue Interior Designing course. Courses and Entrance Exams.
Diploma Courses
Advance Diploma in Fashion, Interior & Textile Design
Advanced Diploma in Interior Design
Certificate in Interior Decoration Design
Diploma in Architectural Assistantship
Designer Coordinator- Interior Design
Graduate Diploma Programme in Design
Graduate Diploma in Interior Space and Equipment Design
Graduate Diploma in Retail and Exhibition Design
One Year Diploma in Interior Designing
Diploma course in Interior Design
Professional Diploma in Furniture & Interior Design
Eligibility Criteria
Candidates who wish to pursue a PG in interior designing or a certificate course in interior designing should have a pass class in the X standard.