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control Schedule - variance analysis - few questions


  1. Schedule variance anlysis refers to a term called "Total Float Variance". I could not follow it well.
    do we keep track of total float deviation from the baseline schedule, and probably draw a run chart of
    float deviation ? ( float variance = baseline float - current float)

  2. After thought, it makes sense to use Schedule deviation rather than schedule variance for EV - PV,
    since variance has a different statistical meaning. any comments ?

  3. Fundamentally, I could not understand how the difference between two costs (Planned value and Earned vlue) gives the notion of time (schedule) performance. any thoughts?

Thanks in advance,

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