Julia Hrdinka
--- a/Core/include/ACTS/Tools/CylinderVolumeBuilder.hpp
+++ b/Core/include/ACTS/Tools/CylinderVolumeBuilder.hpp
  ///| Negative Endcap | Barrel | Positive Endcap |	=> four boundaries needed in
  /// z
  ///                  | Barrel |				    => two boundaries needed in z
-  /// the zBoundaries do not need to be handed over sorted, they will be sorted
-  /// in ascending order automatically
+  /// @note the zBoundaries need to be handed over sorted in ascending order
  std::vector<double> zBoundaries;

  /// Default constructor
-  SubVolumeConfig() : present(false), rMin(10e10), rMax(10e-10), zBoundaries()
-  {
-    if (zBoundaries.size() > 1 && rMin >= 0. && rMax > 0.) present = true;
-    // make sure the zBoundaries are sorted in ascending order
-    std::sort(zBoundaries.begin(), zBoundaries.end());
-  }
+  SubVolumeConfig() : rMin(10e10), rMax(10e-10), zBoundaries() {}