/// <summary>
/// Identifies SCC in DSM (read chapter 3.2.2 in reference [2]), this information is passed back in the object array vClus.
/// </summary>
/// <param name="DSM"></param>
/// <returns></returns>
private static List <Cluster> Decompose(DesignStructureMatrix DSM)
{
DesignStructureMatrix DSMt = DesignStructureMatrix.Build.Dense(DSM.ColumnCount, DSM.ColumnCount);
DesignStructureMatrix DSMmul = DesignStructureMatrix.Build.DenseIdentity(DSM.ColumnCount, DSM.ColumnCount);
for (int c = 0; c < DSM.ColumnCount; c++)
{
DSMmul = DSM * DSMmul;
DSMmul.ReplaceGreaterthanWith(1, 1);
DSMt = DSMt + DSMmul;
}
DSMt = DSMt.PointwiseMultiply(DSMt.Transpose());
DSMt.ReplaceGreaterthanWith(1, 1);
return(GatherClusters(DSMt));
}
/// <summary>
/// Identifies the sequence for the Dsm for which its contents become all feed forward.
/// The method is described in detail in reference [2] chapter 3.2.3.2.
/// </summary>
/// <param name="DSM"></param>
/// <returns></returns>
private static List <int> SequenceDsm(DesignStructureMatrix DSM)
{
int[] sequencedDSM = new int[DSM.ColumnCount];
DesignStructureMatrix E0 = DesignStructureMatrix.Build.Dense(DSM.ColumnCount, 1, 1);
int nLoc = 0;
while (nLoc < DSM.ColumnCount)
{
DesignStructureMatrix PE0 = DSM * E0;
List <int> locations = PE0.Column(0).FindLocations(1);
for (int l = 0; l < locations.Count; l++)
{
sequencedDSM[nLoc] = locations[l];
nLoc++;
}
E0 = PE0;
E0.ReplaceLessthanWith(2, 0);
E0.ReplaceGreaterthanWith(1, 1);
}
return(sequencedDSM.ToList());
}
