Hi
bhaumik93, congrats on the invite!
The AdCom will weigh all interviews equally, so the choice between in-person and Skype should be driven more by which format you feel more comfortable with. The AdComs will also tell you to first try and do an in-person interview as it makes for a more natural and engaging conversation for most people. But, if you're someone who is comfortable talking into a screen and can quickly establish a rapport with a person who's not physically in front of you, then it's completely fine to go for a Skype interview. I can definitely tell you that Skype interviews are not 'looked down upon' - if so, the AdComs would not be spending time and energy coaching the student interviewers.
I chose to do a Skype interview with a Ross MBA 2 (in fact, I did all my other school interviews online as well, either by design or by choice) and had a fantastic experience!
I can't speak much about interviewing in-person with an alum, but I can talk about my reasons for choosing to interview with current students. Firstly, student interviewers are MBA2s who have been in the applicant's shoes a year back, and hence generally tend to be kinder and more open to listening. They also receive extensive anti-bias training. More importantly, if you mention particular resources/opportunities at Ross that you are interested in, chances are that those would resonate more with a student interviewer who might either himself/herself be utilizing those or have friends/peers who've taken up those classes/projects/clubs vs. an alum who might have attended school 10-15 years ago. Additionally, if you've been networking and have already spoken to current students during your school research/essay writing process, you can drop names (nicely, of course

) and it might be that your interviewer knows that person, which can be a good way to establish a rapport too.
TL;DR - If you're not able to find an in-person interview slot and you are reasonably comfortable with talking into a screen, don't sweat it and go for a Skype interview. All interviews are considered equal by the AdCom.
I hope this helps, and good luck with your interview!
bhaumik93
Thanks
variantguy for the tips.
How important is it to have face to face interview? Are Skype interviews looked down negativity?
Currently i am unable to find a timeslot which suits my schedule to interview with an alum
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