ifcopenshell.api.sequence.recalculate_schedule

Module Contents

class ifcopenshell.api.sequence.recalculate_schedule.Usecase

add_node(task: ifcopenshell.entity_instance) → None

backward_pass(node) → bool

build_network_graph() → None

calculate_free_float(predecessor_date: datetime.datetime, successor_date: datetime.datetime, lag_time: int, predecessor_data: dict, successor_data: dict) → datetime.timedelta

execute(work_schedule: ifcopenshell.entity_instance) → None

forward_pass(node) → bool

offset_date(date: datetime.datetime, days: int, node: dict) → datetime.datetime

update_task_times() → None

file: ifcopenshell.file

ifcopenshell.api.sequence.recalculate_schedule.recalculate_schedule(file: ifcopenshell.file, work_schedule: ifcopenshell.entity_instance) → None

Calculate the critical path and floats for a work schedule

This implements critical path analysis, using the forward pass and backward pass method. When run, any tasks that have no float will be marked as critical, and both the total and free floats will be populated for all task times.

Cyclical relationships are detected and will result in a recursion error.

Parameters:

work_schedule – The IfcWorkSchedule to perform the calculation on.

Returns:

None

Example:

# See the example for ifcopenshell.api.sequence.cascade_schedule for
# details of how to set up a basic set of tasks and calculate the
# critical path. Typically cascade_schedule is run prior to ensure
# that dates are correct.