digraph ProcessHierarchie {

  P1[label="P01\nfork()"];

  P11[label="P01\nfork()"];
  P12[label="P02\nfork()"];

  P111[label="P01\nfork()"];
  P112[label="P03\nfork()"];
  P121[label="P02\nfork()"];
  P122[label="P04\nfork()"];

  P1111[label="P01\nfork()"];
  P1112[label="P05\nfork()"];
  P1121[label="P03\nfork()"];
  P1122[label="P06\nfork()"];
  P1211[label="P02\nfork()"];
  P1212[label="P07\nfork()"];
  P1221[label="P04\nfork()"];
  P1222[label="P08\nfork()"];

  P11111[label="P01"];
  P11112[label="P09"];
  P11121[label="P05"];
  P11122[label="P10"];
  P11211[label="P03"];
  P11212[label="P11"];
  P11221[label="P06"];
  P11222[label="P12"];
  P12111[label="P02"];
  P12112[label="P13"];
  P12121[label="P07"];
  P12122[label="P14"];
  P12211[label="P04"];
  P12212[label="P15"];
  P12221[label="P08"];
  P12222[label="P16"];

  P1 -> P11
  P1 -> P12

  P11 -> P111
  P11 -> P112
  P12 -> P121
  P12 -> P122

  P111 -> P1111
  P111 -> P1112
  P112 -> P1121
  P112 -> P1122
  P121 -> P1211
  P121 -> P1212
  P122 -> P1221
  P122 -> P1222

  P1111 -> P11111
  P1111 -> P11112
  P1112 -> P11121
  P1112 -> P11122
  P1121 -> P11211
  P1121 -> P11212
  P1122 -> P11221
  P1122 -> P11222
  P1211 -> P12111
  P1211 -> P12112
  P1212 -> P12121
  P1212 -> P12122
  P1221 -> P12211
  P1221 -> P12212
  P1222 -> P12221
  P1222 -> P12222

  { rank="same"; P11; P12; }
#  { rank="same"; P1; P11; P111; P1111; P11111; }

}