ReworkEvents

Rework counts per shift, per reason and over time, the rework rate against total production, and rework cost per part number, from a cumulative rework counter.

ts_shape.events.production.rework_tracking · Production guide · API reference

Example

import numpy as np
import pandas as pd
import ts_shape
from ts_shape.events.production.rework_tracking import ReworkEvents

t = pd.date_range("2024-01-01 06:00", periods=960, freq="1min")
df = pd.concat([
    pd.DataFrame({"systime": t, "uuid": "line1:rework", "value_integer": np.arange(960) // 40}),
    pd.DataFrame({"systime": t, "uuid": "line1:parts", "value_integer": np.arange(960)}),
    ts_shape.make_id_signal("line1:part_id", ["PN-100", "PN-200"], hold=480, freq="1min", start="2024-01-01 06:00"),
], ignore_index=True)

rw = ReworkEvents(df)
result = rw.rework_rate(rework_uuid="line1:rework", total_production_uuid="line1:parts")
print(result[["date", "shift", "total_produced", "rework_count", "rework_rate_pct"]])
cost = rw.rework_cost(rework_uuid="line1:rework", part_id_uuid="line1:part_id",
                      rework_costs={"PN-100": 12.50, "PN-200": 8.75})

Methods

Method	Returns
rework_by_shift(rework_uuid)	date, shift, rework_count
rework_by_reason(rework_uuid, reason_uuid)	reason, rework_count, share_of_total_pct
rework_rate(rework_uuid, total_production_uuid)	per shift: total_produced, rework_count, rework_rate_pct
rework_cost(rework_uuid, part_id_uuid, rework_costs)	per part: rework_count, cost_per_rework, total_cost
rework_trend(rework_uuid, window='1D')	period, rework_count

Notes

• With handle_resets=True (default) a decreasing counter is a reset and the rework after it still counts. Increments are computed once over the whole signal and booked to the shift, reason or part of the reading that reports them, so groups add up to the counter total. All methods except rework_rate add a resets column. handle_resets=False uses max(0, last - first) per group.
• rework_costs maps part numbers (values of the part_id_uuid signal) to the cost of one rework.
• Default shifts are 06-14, 14-22, 22-06; a night shift belongs to its start date (production_day=True).