Tableau Creating a Timeline on only two dates

Question

I have been working on data visulization which shows us the office markets and i want to focus on object type instead regional, national or global market levels

Let us consider they are,There is a property A which has tenanta A,B,C and A and B has been in the building from the time it was constructed.B has join in middle like after 6 months

PropertyName} {CompanyName} {StartDateLease} {EndDateLease} {LeaseSize} {PropertySize} {PropertyVacancy} 

  Building A Tenant A 01-01-2011 01-01-2016 2000 5000 [CalculatedValue] 

Answer 1

Calculated feild:SUM(IF CONTAINS([Occupied by],'Tenant') THEN [LeaseSpace] END) / SUM([LeaseSpace])

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