Employment visa - timeframe

Dear all,

I accepted a job offer from Dammam about a week back.  However they have not asked for my passport copy and documents as yet.

I found some information on some other sites, and understand that the visa process might over 3 months, and the process will entail -

1. Work authorization / approval code to be obtained by the sponsor [1-2 months]
2. Resigning at my current job.
3. Degree attestation and medical to be done in my home country [1 month]
4. Visa approval from KSA [1-2 weeks]
5. Visa stamping at KSA embassy in home country [1-2 weeks]

Is my understanding correct, and also how long it takes to sponsor wife and children? 

I am a bit concerned that am not contacted for documentation and hence the work authorization process process might not have commenced. But perhaps things get slowed down in Ramadan so will follow-up next week.