An e-Visa is generally processed with in 4-5 working days , however the approval or grant of visa depends upon the immigration of the specific country and it may take longer than 5 working days as per respective country's policy.

Before we get into the different ways of obtaining a visa, it’s important to point out that a country may require you to apply for a visa in a certain way.
Embassy visa: The most familiar and traditional way of applying Visa is with an embassy . In this the traveler is required to visit the embassy with the required documents to apply for a visa
E visa: An E visa is a visa which is applied online along with documentation which may be required to be uploaded online . These visas are typically limited to travel for tourism purposes , however lot of countries are also approving E visas for Business purposes.
Visa on arrival: Also called a border gate visa Or VOA you can get this type of visa at the border as you enter a country. You will still be required to provide documentation and pay a fee. Like an E Visa, they’re typically only issued to those traveling for tourism.
ETA: Also known as Electronic Travel Authorization., ETA is an official authorization for a Short Visit and is issued electronically. The ETA is introduced with the intention of providing an efficient, reliable and simplified service for travelers intend ending to travel to other countries.

Validity of visa depends upon the issuing country and the category in which the same is applied for

Most of the countries need the passport to be valid for a minimum of 6 months .

Two photos of the applicant
-Portrait photo - Looking straight and without glasses.
-Passport data page: Full page including photo, personal information and ICAO lines.
Any other documents as advised by your Consultant