Negative Schedule Variance

Hi Kannan, You are right. Negative SV only means that project is behind, as per the current schedule, on status or control date. It does not give any indication of the future work. For more on variances, you can look at https://www.pmbypm.com/basics-earned-value-analysis/

If you are not doing enough work there will eventually be a major issue -ve SV highlight this.

If you are not doing the right work there is a problem -ve Float highlights this. 

You need both sets of information (and their trends) to really understand the situation on a project. See: https://mosaicprojects.com.au/Resources_Papers_117.html

glad I could help 

negative float yes 

ngeative variance no because there can be float in the schedule that tyou are comparing against.