MBA/PGDM

Hi Amitabh,
The college is really good. The institute is rated amongst the top 25 B-Schools in India by various surveys including the Business World, Business Standard, and AIMA. The faculty pool at NDIM is globally acknowledged and has remained associated with 19 international universities.
When it comes to placement, NDIM has been consistently ranked amongst top 20 B-Schools in India for 3 years in succession by AIMA, Business Standard & Business World. A total of 320+ companies offered placements to 390+ students of PGDM 2014-16 Batch, some of the recruiters were ABP News, Aditya Birla Group, American Express, Ameriprise, Asian Paints, Avon, Axis Bank, Bajaj Electricals, Baush & Lomb, Berger Paints, Bharti Paint, Bridgestone, Capital First, Castrol, Citi Bank, CNFC Media, Cafe Coffee Day, Copal Amba, Decathalon, Deloitte, Deutsche Bank, Ernst & Young etc.
Average Package: Rs. 5-6 LPA
Highest Domestic Package: Rs. 14 LPA

Diploma in business management is a 1 year long Diploma certificate course. This course can be pursued by students who have passed 10th standard, 12th standard or those who have completed graduation.
Eligibility criteria: Minimum educational qualification varies from one institute to another. Let us check them out-
10th passed (or equivalent) from a recognized board
12th passed or 10th+ 3 years Diploma passed (or equivalent) from a recognized board
As you can see, some institutes do give admission to 10th passed students. Some other institutes accept only 12th passed or Diploma (3 years course) holders. Readers are supposed to check the criteria followed by an institute while taking admission. Note: Some institutes also demand work experience.
Admission process: Depending upon the institute, it could be merit based admission process or direct admission process. In case of merit based admission process, marks scored by a student in relevant board examination or Diploma course is taken into consideration. Seats are allotted to deserving candidates on the basis of marks secured by them.

If you just want to get an "MBA" degree then you can go ahead for part-time MBA. It won't teach you much, you will have to appear for exams and you have a degree with minimal value to help in your career.
The reason people do part-time MBA is, sometime helps them to get promotion in their current jobs. There may be a situation where your promotion is avoided since you don't have a advance degree in comparison to your peers. I have seen some big hot shot corporate biggies who don't have a full time MBA degree and their employer don't know about this. They just used a part-time MBA degree to jump few ladders in corporate world. Keep in mind some institutions offer part-time MBA degree without mentioning anything about part-time in degree certificate.