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ES, EF, LS, LF calculations in work schedules now are calendar based. Thanks SigmaDimensions!

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This commit is contained in:
Dion Moult
2021-06-04 15:20:38 +10:00
parent 2ac6fe9eef
commit 6f8861c030
2 changed files with 107 additions and 44 deletions
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src/ifcopenshell-python/ifcopenshell/api/sequence/recalculate_schedule.py
+69 -43
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@@ -2,6 +2,7 @@ import datetime
import networkx as nx
import ifcopenshell.api
import ifcopenshell.util.date
import ifcopenshell.util.sequence
class Usecase:
@@ -12,8 +13,9 @@ class Usecase:
self.settings[key] = value
def execute(self):
# I learned everything about project dependency calcs from this YouTube playlist:
# https://www.youtube.com/playlist?list=PLLRADeJk4TCK-X5vJY8focpFkau1MR7do
# The method implemented is the same as shown here:
# https://www.youtube.com/watch?v=qTErIV6OqLg
self.start_dates = []
self.build_network_graph()
self.pending_nodes = set(self.g.nodes)
@@ -34,13 +36,6 @@ class Usecase:
self.update_task_times()
# TODO: normalise durations to elapsed times. Leave this debug print until we finish this TODO.
for n in self.g.nodes:
if n == 'start' or n == 'finish':
print(n, self.g.nodes[n])
else:
print(self.file.by_id(n), self.g.nodes[n])
def build_network_graph(self):
self.sequence_type_map = {
None: "FS",
@@ -53,8 +48,8 @@ class Usecase:
}
self.g = nx.DiGraph()
self.edges = []
self.g.add_node("start", duration=0)
self.g.add_node("finish", duration=0)
self.g.add_node("start", duration=0, duration_type="ELAPSEDTIME", calendar=None)
self.g.add_node("finish", duration=0, duration_type="ELAPSEDTIME", calendar=None)
for rel in self.settings["work_schedule"].Controls:
for related_object in rel.RelatedObjects:
if not related_object.is_a("IfcTask"):
@@ -70,9 +65,18 @@ class Usecase:
if task.TaskTime and task.TaskTime.ScheduleDuration:
duration = ifcopenshell.util.date.ifc2datetime(task.TaskTime.ScheduleDuration).days
duration_type = task.TaskTime.DurationType
else:
duration = 0
self.g.add_node(task.id(), duration=duration)
duration_type = "ELAPSEDTIME"
self.g.add_node(
task.id(),
duration=duration,
duration_type=duration_type,
calendar=ifcopenshell.util.sequence.derive_calendar(task),
)
self.edges.extend(
[
(
@@ -95,6 +99,8 @@ class Usecase:
"FINISH_START" not in predecessor_types and "START_START" not in predecessor_types
):
self.edges.append(("start", task.id(), {"lag_time": 0, "type": "FS"}))
if task.TaskTime and task.TaskTime.ScheduleStart:
self.start_dates.append(ifcopenshell.util.date.ifc2datetime(task.TaskTime.ScheduleStart))
if not successor_types or ("FINISH_START" not in successor_types and "FINISH_FINISH" not in successor_types):
self.edges.append((task.id(), "finish", {"lag_time": 0, "type": "FS"}))
@@ -108,52 +114,64 @@ class Usecase:
self.file,
task_time=self.file.by_id(ifc_definition_id).TaskTime,
attributes={
"TotalFloat": ifcopenshell.util.date.datetime2ifc(
datetime.timedelta(days=data["total_float"]), "IfcDuration"
),
"IsCritical": data["total_float"] == 0,
"TotalFloat": ifcopenshell.util.date.datetime2ifc(data["total_float"], "IfcDuration"),
"IsCritical": data["total_float"].days == 0,
"EarlyStart": ifcopenshell.util.date.datetime2ifc(data["early_start"], "IfcDateTime"),
"EarlyFinish": ifcopenshell.util.date.datetime2ifc(data["early_finish"], "IfcDateTime"),
"LateStart": ifcopenshell.util.date.datetime2ifc(data["late_start"], "IfcDateTime"),
"LateFinish": ifcopenshell.util.date.datetime2ifc(data["late_finish"], "IfcDateTime"),
},
)
def offset_date(self, date, days, node):
return ifcopenshell.util.sequence.get_finish_date(
date, datetime.timedelta(days=days), node["duration_type"], node["calendar"]
)
def forward_pass(self, node):
successors = self.g.successors(node)
predecessors = list(self.g.predecessors(node))
data = self.g.nodes[node]
if node == "start":
data["early_start"] = 0
data["early_start"] = min(self.start_dates)
else:
finishes = []
starts = []
for predecessor in predecessors:
predecessor_data = self.g.nodes[predecessor]
edge = self.g[predecessor][node]
if edge["type"] == "FS":
finish = self.g.nodes[predecessor].get("early_finish")
finish = predecessor_data.get("early_finish")
if finish is None:
return
starts.append(finish + edge["lag_time"])
starts.append(self.offset_date(finish, edge["lag_time"], data))
starts.append(self.offset_date(finish, edge["lag_time"], predecessor_data))
elif edge["type"] == "SS":
start = self.g.nodes[predecessor].get("early_start")
start = predecessor_data.get("early_start")
if start is None:
return
starts.append(start + edge["lag_time"])
starts.append(self.offset_date(start, edge["lag_time"], data))
starts.append(self.offset_date(start, edge["lag_time"], predecessor_data))
elif edge["type"] == "FF":
finish = self.g.nodes[predecessor].get("early_finish")
finish = predecessor_data.get("early_finish")
if finish is None:
return
finishes.append(finish + edge["lag_time"])
finishes.append(self.offset_date(finish, edge["lag_time"], data))
finishes.append(self.offset_date(finish, edge["lag_time"], predecessor_data))
elif edge["type"] == "SF":
start = self.g.nodes[predecessor].get("early_start")
start = predecessor_data.get("early_start")
if start is None:
return
finishes.append(start + edge["lag_time"])
finishes.append(self.offset_date(start, edge["lag_time"], data))
finishes.append(self.offset_date(start, edge["lag_time"], predecessor_data))
if starts and finishes:
data["early_start"] = max(starts)
data["early_finish"] = max(finishes)
if data["early_start"] + data["duration"] > data["early_finish"]:
data["early_finish"] = data["early_start"] + data["duration"]
if self.offset_date(data["early_start"], data["duration"], data) > data["early_finish"]:
data["early_finish"] = self.offset_date(data["early_start"], data["duration"], data)
else:
data["early_start"] = data["early_finish"] - data["duration"]
data["early_start"] = self.offset_date(data["early_finish"], -data["duration"], data)
elif finishes:
data["early_finish"] = max(finishes)
elif starts:
@@ -162,9 +180,9 @@ class Usecase:
print("How did this happen?")
if data.get("early_finish") is None:
data["early_finish"] = data["early_start"] + data["duration"]
data["early_finish"] = self.offset_date(data["early_start"], data["duration"], data)
elif data.get("early_start") is None:
data["early_start"] = data["early_finish"] - data["duration"]
data["early_start"] = self.offset_date(data["early_finish"], -data["duration"], data)
return True
@@ -179,34 +197,39 @@ class Usecase:
finishes = []
starts = []
for successor in successors:
successor_data = self.g.nodes[successor]
edge = self.g[node][successor]
if edge["type"] == "FS":
start = self.g.nodes[successor].get("late_start")
start = successor_data.get("late_start")
if start is None:
return
finishes.append(start - edge["lag_time"])
finishes.append(self.offset_date(start, -edge["lag_time"], data))
finishes.append(self.offset_date(start, -edge["lag_time"], successor_data))
elif edge["type"] == "SS":
start = self.g.nodes[successor].get("late_start")
start = successor_data.get("late_start")
if start is None:
return
starts.append(start - edge["lag_time"])
starts.append(self.offset_date(start, -edge["lag_time"], data))
starts.append(self.offset_date(start, -edge["lag_time"], successor_data))
elif edge["type"] == "FF":
finish = self.g.nodes[successor].get("late_finish")
finish = successor_data.get("late_finish")
if finish is None:
return
finishes.append(finish - edge["lag_time"])
finishes.append(self.offset_date(finish, -edge["lag_time"], data))
finishes.append(self.offset_date(finish, -edge["lag_time"], successor_data))
elif edge["type"] == "SF":
finish = self.g.nodes[successor].get("late_finish")
finish = successor_data.get("late_finish")
if finish is None:
return
starts.append(finish - edge["lag_time"])
starts.append(self.offset_date(finish, -edge["lag_time"], data))
starts.append(self.offset_date(finish, -edge["lag_time"], successor_data))
if starts and finishes:
data["late_start"] = min(starts)
data["late_finish"] = min(finishes)
if data["late_start"] + data["duration"] < data["late_finish"]:
data["late_finish"] = data["late_start"] + data["duration"]
if self.offset_date(data["late_start"], data["duration"], data) < data["late_finish"]:
data["late_finish"] = self.offset_date(data["late_start"], data["duration"], data)
else:
data["late_start"] = data["late_finish"] - data["duration"]
data["late_start"] = self.offset_date(data["late_finish"], -data["duration"], data)
elif finishes:
data["late_finish"] = min(finishes)
elif starts:
@@ -215,10 +238,13 @@ class Usecase:
print("How did this happen?")
if data.get("late_finish") is None:
data["late_finish"] = data["late_start"] + data["duration"]
data["late_finish"] = self.offset_date(data["late_start"], data["duration"], data)
elif data.get("late_start") is None:
data["late_start"] = data["late_finish"] - data["duration"]
data["late_start"] = self.offset_date(data["late_finish"], -data["duration"], data)
data["total_float"] = data["late_finish"] - data["early_finish"]
# Waiting for yassine to confirm relationships
# data["free_float"] = min([self.g.nodes[s]["early_start"] for s in successors])
return True