class AliITSPlaneEff: public AliPlaneEff

    Assignment operator
 Inputs:
    const AliITSPlaneEff &source  simulation class to copy from
 Outputs:
    none.
 Return:
    a standard constructed AliITSPlaneEff class with values the same
    as that of s.

 copy this to obj

 Compute the efficiency for a basic block,
 Inputs:
        number of associated cluslters (nf)
        number of used tracks (nt)
 Outputs:
    none.
 Return:
        the efficiency

 Compute the statistical error on efficiency for a basic block,
 using binomial statistics
 Inputs:
        number of associated cluslters (nf)
        number of used tracks (nt)
 Outputs:
    none.
 Return:
        the error on the efficiency

 Estimate of the number of tracks needed for measuring efficiency
 with a given relative error using binomial statistics
 Inputs:
        exspected efficiency eff (e.g. from previous measurements)
        wished relative error RelErr
 Outputs:
    none.
 Return: number of tracks given as the nearest integer

 activate a default CDB storage
 First check if we have any CDB storage set, because it is used
 to retrieve the calibration and alignment constants

 Store the desired default CDB storage location
 Activate it later within the Run() method

 Standard constructor

 Simple way to add another class (i.e. statistics).
AliITSPlaneEff& operator +=( const AliITSPlaneEff &){return *this};
 Average Plane efficiency (including dead/noisy)

 Plane efficiency for active  detector (excluding dead/noisy channels)

 Compute the fraction of Live detector

 Compute the fraction of Bad (i.e. dead + noisy) detector

 Update the Counting of the plane efficiency

 Estimate of the number of tracks needed for measuring efficiency within RelErr

 Write into the data base

 method to locate a basic block from Detector Local coordinate

 Methods for dealing with auxiliary histograms
 method to set on/off the creation/updates of histograms (Histos are created/destroyed)