Module Contents

ifcopenshell.api.sequence.unassign_lag_time.unassign_lag_time(file, rel_sequence=None) None

Removes any lag time in a sequence

The schedule is cascaded afterwards.


rel_sequence (ifcopenshell.entity_instance) – The sequence to remove the lag time from.



Return type:



# Let's imagine we are creating a construction schedule. All tasks
# need to be part of a work schedule.
schedule = ifcopenshell.api.run("sequence.add_work_schedule", model, name="Construction Schedule A")

# Let's imagine a root construction task
construction = ifcopenshell.api.run("sequence.add_task", model,
    work_schedule=schedule, name="Construction", identification="C")

# Let's imagine we're building 2 zones, one after another.
zone1 = ifcopenshell.api.run("sequence.add_task", model,
    parent_task=construction, name="Zone 1", identification="C.1")
zone2 = ifcopenshell.api.run("sequence.add_task", model,
    parent_task=construction, name="Zone 2", identification="C.2")

# Zone 1 finishes, then zone 2 starts.
sequence = ifcopenshell.api.run("sequence.assign_sequence", model,
    relating_process=zone1, related_process=zone2)

# What if you had to wait 1 week before you could start zone 2?
ifcopenshell.api.run("sequence.assign_lag_time", model, rel_sequence=sequence, lag_value="P1W")

# What if you didn't?
ifcopenshell.api.run("sequence.unassign_lag_time", model, rel_sequence=sequence)