If you have some questions...
No, you do not need to take the TOEFL but the language of instruction for all the doctoral programs taught within the Faculty of Business and Economics is English. Although you do not need to show proof of your English proficiency at the time of application, English proficiency is necessary to succeed on the program. Although not required, having a basic knowledge of French is useful for a smoother acculturation in Lausanne.
No, these tests are not required for your application but if you have already taken any of them, you can submit the scores along with the other application documents.
In principle, an MBA is not considered on the same level as a Master of Science degree (or equivalent) and does not give access to doctoral studies at our university. More information can be found here.
The registration fees amount to CHF 280 for the first semester of enrollment and CHF 80 for each additional semester. PhD students also have to pay a one-time defense fee amounting to CHF 500 at the end of their PhD. In addition, holders of foreign higher education institutions must pay a CHF 200 fee for the evaluation of their file by the central Admissions office. The minimum monthly budget for living in Lausanne is estimated at CHF 2'500. More information can be found here.
Yes, it is possible but challenging. It is a full time program and one needs to spend about 20 hours per week on the program. Given the course load of the first two years, you should find a job which is flexible in terms of working hours to allow you to attend the classes and the department seminars required for your Ph.D. More information on the doctoral courses here.
The Ph.D. should last no less than 6 semesters and no more than 10 semesters.