direction: right

lot1: "Batch 1 (2 jobs)" {
  grid-columns: 1
  j1: "Job 1"
  j2: "Job 2"
}
lot2: "Batch 2 (2 jobs)" {
  grid-columns: 1
  j3: "Job 3"
  j4: "Job 4"
}
lot3: "Batch 3 (1 job)" {
  grid-columns: 1
  j5: "Job 5"
}

lot1 -> lot2: "time" { class: principal }
lot2 -> lot3: "time" { class: principal }