FA-64321 / Medication dosing calculations / Open access

Single-level extended-interval nomogram: midnight crossing · case 01

A 02:00 level after a 20:00 dose is read as 18 hours and rejected.

Verified by executionVariant 1 · 7 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Negative clock differences are made positive instead of wrapped to the next day.

VERIFIED REPAIR

Add 1440 minutes when the draw clock time is earlier than the dose time.

Unsuccessful approach: Wrapping by 720 minutes assumes a 12-hour clock.

Case contract

Input {dose "HH:MM", draw "HH:MM" (a draw clock time earlier than the dose means the next day), level mg/L}. Hours after dose must be within 6-14 inclusive, else OUT_OF_RANGE. With rem = 14 - hours: level <= 2 + rem/2 gives q24h; <= 4 + 0.75*rem gives q36h; <= 6 + rem gives q48h; otherwise HOLD_RECHECK. Return {interval, hours (2 dp)}.

Why this case matters

Interval nomograms read a timed level against sloped lines; clock arithmetic and line edges are separate defect sites.

1 / The failure

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json
import math
from fractions import Fraction
N = 1
observations = []
def solve(x):
    def mins(s):
        h, m = map(int, s.split(':'))
        return h * 60 + m
    dt = mins(x['draw']) - mins(x['dose'])
    dt = abs(dt)
    hrs = Fraction(dt, 60)
    if hrs < 6 or hrs > 14:
        return {'interval': 'OUT_OF_RANGE', 'hours': round(float(hrs), 2)}
    lv = Fraction(str(x['level']))
    rem = 14 - hrs
    if lv <= 2 + rem / 2:
        iv = 'q24h'
    elif lv <= 4 + rem * Fraction(3, 4):
        iv = 'q36h'
    elif lv <= 6 + rem:
        iv = 'q48h'
    else:
        iv = 'HOLD_RECHECK'
    return {'interval': iv, 'hours': round(float(hrs), 2)}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('draw after midnight',
   {'dose': '20:00', 'draw': '03:00', 'level': '4'},
   {'interval': 'q24h', 'hours': 7.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 6}, {'interval': 'q24h', 'hours': 6.0}),
  ('exactly 14 hours', {'dose': '06:30', 'draw': '20:30', 'level': '2'}, {'interval': 'q24h', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:10', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.17}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:15', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.25}),
  ('on the q24 line', {'dose': '08:00', 'draw': '17:00', 'level': '4.5'}, {'interval': 'q24h', 'hours': 9.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 4},
   {'interval': 'q24h', 'hours': 10.0})],
 [('draw after midnight',
   {'dose': '20:00', 'draw': '04:00', 'level': '4'},
   {'interval': 'q24h', 'hours': 8.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 7}, {'interval': 'q36h', 'hours': 6.0}),
  ('exactly 14 hours', {'dose': '06:30', 'draw': '20:30', 'level': '3'}, {'interval': 'q36h', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:20', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.33}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:20', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.33}),
  ('on the q24 line', {'dose': '08:00', 'draw': '15:00', 'level': '5.5'}, {'interval': 'q24h', 'hours': 7.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 5},
   {'interval': 'q36h', 'hours': 10.0})],
 [('draw after midnight',
   {'dose': '20:00', 'draw': '05:00', 'level': '4'},
   {'interval': 'q24h', 'hours': 9.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 8}, {'interval': 'q36h', 'hours': 6.0}),
  ('exactly 14 hours', {'dose': '06:30', 'draw': '20:30', 'level': '4'}, {'interval': 'q36h', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:30', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.5}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:25', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.42}),
  ('on the q24 line',
   {'dose': '08:00', 'draw': '19:00', 'level': '3.5'},
   {'interval': 'q24h', 'hours': 11.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 6},
   {'interval': 'q36h', 'hours': 10.0})],
 [('draw after midnight',
   {'dose': '20:00', 'draw': '06:00', 'level': '4'},
   {'interval': 'q24h', 'hours': 10.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 9}, {'interval': 'q36h', 'hours': 6.0}),
  ('exactly 14 hours', {'dose': '06:30', 'draw': '20:30', 'level': '6'}, {'interval': 'q48h', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:40', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.67}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:30', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.5}),
  ('on the q24 line',
   {'dose': '08:00', 'draw': '21:00', 'level': '2.5'},
   {'interval': 'q24h', 'hours': 13.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 7},
   {'interval': 'q36h', 'hours': 10.0})],
 [('draw after midnight',
   {'dose': '20:00', 'draw': '07:00', 'level': '4'},
   {'interval': 'q36h', 'hours': 11.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 10}, {'interval': 'q36h', 'hours': 6.0}),
  ('exactly 14 hours',
   {'dose': '06:30', 'draw': '20:30', 'level': '7'},
   {'interval': 'HOLD_RECHECK', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:50', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.83}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:35', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.58}),
  ('on the q24 line', {'dose': '08:00', 'draw': '17:00', 'level': '4.5'}, {'interval': 'q24h', 'hours': 9.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 8},
   {'interval': 'q48h', 'hours': 10.0})]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
draw after midnight	`{'hours': 17.0, 'interval': 'OUT_OF_RANGE'}`	`{'hours': 7.0, 'interval': 'q24h'}`	Failed
exactly 6 hours	`{'hours': 6.0, 'interval': 'q24h'}`	`{'hours': 6.0, 'interval': 'q24h'}`	Passed
exactly 14 hours	`{'hours': 14.0, 'interval': 'q24h'}`	`{'hours': 14.0, 'interval': 'q24h'}`	Passed
beyond 14 hours	`{'hours': 14.17, 'interval': 'OUT_OF_RANGE'}`	`{'hours': 14.17, 'interval': 'OUT_OF_RANGE'}`	Passed
fractional hour reading	`{'hours': 10.25, 'interval': 'q36h'}`	`{'hours': 10.25, 'interval': 'q36h'}`	Passed
on the q24 line	`{'hours': 9.0, 'interval': 'q24h'}`	`{'hours': 9.0, 'interval': 'q24h'}`	Passed
late draw mid-band	`{'hours': 10.0, 'interval': 'q24h'}`	`{'hours': 10.0, 'interval': 'q24h'}`	Passed

SHA-256 / d635d7f33a3c8c82bea40c0133efda243fddf1759b2f306a3a0c70c70b125b58

2 / The unsuccessful fix

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json
import math
from fractions import Fraction
N = 1
observations = []
def solve(x):
    def mins(s):
        h, m = map(int, s.split(':'))
        return h * 60 + m
    dt = mins(x['draw']) - mins(x['dose'])
    if dt < 0:
        dt += 720
    hrs = Fraction(dt, 60)
    if hrs < 6 or hrs > 14:
        return {'interval': 'OUT_OF_RANGE', 'hours': round(float(hrs), 2)}
    lv = Fraction(str(x['level']))
    rem = 14 - hrs
    if lv <= 2 + rem / 2:
        iv = 'q24h'
    elif lv <= 4 + rem * Fraction(3, 4):
        iv = 'q36h'
    elif lv <= 6 + rem:
        iv = 'q48h'
    else:
        iv = 'HOLD_RECHECK'
    return {'interval': iv, 'hours': round(float(hrs), 2)}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('draw after midnight',
   {'dose': '20:00', 'draw': '03:00', 'level': '4'},
   {'interval': 'q24h', 'hours': 7.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 6}, {'interval': 'q24h', 'hours': 6.0}),
  ('exactly 14 hours', {'dose': '06:30', 'draw': '20:30', 'level': '2'}, {'interval': 'q24h', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:10', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.17}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:15', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.25}),
  ('on the q24 line', {'dose': '08:00', 'draw': '17:00', 'level': '4.5'}, {'interval': 'q24h', 'hours': 9.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 4},
   {'interval': 'q24h', 'hours': 10.0})],
 [('draw after midnight',
   {'dose': '20:00', 'draw': '04:00', 'level': '4'},
   {'interval': 'q24h', 'hours': 8.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 7}, {'interval': 'q36h', 'hours': 6.0}),
  ('exactly 14 hours', {'dose': '06:30', 'draw': '20:30', 'level': '3'}, {'interval': 'q36h', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:20', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.33}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:20', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.33}),
  ('on the q24 line', {'dose': '08:00', 'draw': '15:00', 'level': '5.5'}, {'interval': 'q24h', 'hours': 7.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 5},
   {'interval': 'q36h', 'hours': 10.0})],
 [('draw after midnight',
   {'dose': '20:00', 'draw': '05:00', 'level': '4'},
   {'interval': 'q24h', 'hours': 9.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 8}, {'interval': 'q36h', 'hours': 6.0}),
  ('exactly 14 hours', {'dose': '06:30', 'draw': '20:30', 'level': '4'}, {'interval': 'q36h', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:30', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.5}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:25', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.42}),
  ('on the q24 line',
   {'dose': '08:00', 'draw': '19:00', 'level': '3.5'},
   {'interval': 'q24h', 'hours': 11.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 6},
   {'interval': 'q36h', 'hours': 10.0})],
 [('draw after midnight',
   {'dose': '20:00', 'draw': '06:00', 'level': '4'},
   {'interval': 'q24h', 'hours': 10.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 9}, {'interval': 'q36h', 'hours': 6.0}),
  ('exactly 14 hours', {'dose': '06:30', 'draw': '20:30', 'level': '6'}, {'interval': 'q48h', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:40', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.67}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:30', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.5}),
  ('on the q24 line',
   {'dose': '08:00', 'draw': '21:00', 'level': '2.5'},
   {'interval': 'q24h', 'hours': 13.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 7},
   {'interval': 'q36h', 'hours': 10.0})],
 [('draw after midnight',
   {'dose': '20:00', 'draw': '07:00', 'level': '4'},
   {'interval': 'q36h', 'hours': 11.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 10}, {'interval': 'q36h', 'hours': 6.0}),
  ('exactly 14 hours',
   {'dose': '06:30', 'draw': '20:30', 'level': '7'},
   {'interval': 'HOLD_RECHECK', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:50', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.83}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:35', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.58}),
  ('on the q24 line', {'dose': '08:00', 'draw': '17:00', 'level': '4.5'}, {'interval': 'q24h', 'hours': 9.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 8},
   {'interval': 'q48h', 'hours': 10.0})]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
draw after midnight	`{'hours': -5.0, 'interval': 'OUT_OF_RANGE'}`	`{'hours': 7.0, 'interval': 'q24h'}`	Failed
exactly 6 hours	`{'hours': 6.0, 'interval': 'q24h'}`	`{'hours': 6.0, 'interval': 'q24h'}`	Passed
exactly 14 hours	`{'hours': 14.0, 'interval': 'q24h'}`	`{'hours': 14.0, 'interval': 'q24h'}`	Passed
beyond 14 hours	`{'hours': 14.17, 'interval': 'OUT_OF_RANGE'}`	`{'hours': 14.17, 'interval': 'OUT_OF_RANGE'}`	Passed
fractional hour reading	`{'hours': 10.25, 'interval': 'q36h'}`	`{'hours': 10.25, 'interval': 'q36h'}`	Passed
on the q24 line	`{'hours': 9.0, 'interval': 'q24h'}`	`{'hours': 9.0, 'interval': 'q24h'}`	Passed
late draw mid-band	`{'hours': 10.0, 'interval': 'q24h'}`	`{'hours': 10.0, 'interval': 'q24h'}`	Passed

SHA-256 / 6903999f33a6e4ad1ebc7969dccf8e302cae3efda683942619f4d57ac69935cf

3 / The verified repair

Exit 0

"""Failure Map reference implementation. Python standard library only."""
import json
import math
from fractions import Fraction
N = 1
observations = []
def solve(x):
    def mins(s):
        h, m = map(int, s.split(':'))
        return h * 60 + m
    dt = mins(x['draw']) - mins(x['dose'])
    if dt < 0:
        dt += 1440
    hrs = Fraction(dt, 60)
    if hrs < 6 or hrs > 14:
        return {'interval': 'OUT_OF_RANGE', 'hours': round(float(hrs), 2)}
    lv = Fraction(str(x['level']))
    rem = 14 - hrs
    if lv <= 2 + rem / 2:
        iv = 'q24h'
    elif lv <= 4 + rem * Fraction(3, 4):
        iv = 'q36h'
    elif lv <= 6 + rem:
        iv = 'q48h'
    else:
        iv = 'HOLD_RECHECK'
    return {'interval': iv, 'hours': round(float(hrs), 2)}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('draw after midnight',
   {'dose': '20:00', 'draw': '03:00', 'level': '4'},
   {'interval': 'q24h', 'hours': 7.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 6}, {'interval': 'q24h', 'hours': 6.0}),
  ('exactly 14 hours', {'dose': '06:30', 'draw': '20:30', 'level': '2'}, {'interval': 'q24h', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:10', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.17}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:15', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.25}),
  ('on the q24 line', {'dose': '08:00', 'draw': '17:00', 'level': '4.5'}, {'interval': 'q24h', 'hours': 9.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 4},
   {'interval': 'q24h', 'hours': 10.0})],
 [('draw after midnight',
   {'dose': '20:00', 'draw': '04:00', 'level': '4'},
   {'interval': 'q24h', 'hours': 8.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 7}, {'interval': 'q36h', 'hours': 6.0}),
  ('exactly 14 hours', {'dose': '06:30', 'draw': '20:30', 'level': '3'}, {'interval': 'q36h', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:20', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.33}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:20', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.33}),
  ('on the q24 line', {'dose': '08:00', 'draw': '15:00', 'level': '5.5'}, {'interval': 'q24h', 'hours': 7.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 5},
   {'interval': 'q36h', 'hours': 10.0})],
 [('draw after midnight',
   {'dose': '20:00', 'draw': '05:00', 'level': '4'},
   {'interval': 'q24h', 'hours': 9.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 8}, {'interval': 'q36h', 'hours': 6.0}),
  ('exactly 14 hours', {'dose': '06:30', 'draw': '20:30', 'level': '4'}, {'interval': 'q36h', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:30', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.5}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:25', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.42}),
  ('on the q24 line',
   {'dose': '08:00', 'draw': '19:00', 'level': '3.5'},
   {'interval': 'q24h', 'hours': 11.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 6},
   {'interval': 'q36h', 'hours': 10.0})],
 [('draw after midnight',
   {'dose': '20:00', 'draw': '06:00', 'level': '4'},
   {'interval': 'q24h', 'hours': 10.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 9}, {'interval': 'q36h', 'hours': 6.0}),
  ('exactly 14 hours', {'dose': '06:30', 'draw': '20:30', 'level': '6'}, {'interval': 'q48h', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:40', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.67}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:30', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.5}),
  ('on the q24 line',
   {'dose': '08:00', 'draw': '21:00', 'level': '2.5'},
   {'interval': 'q24h', 'hours': 13.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 7},
   {'interval': 'q36h', 'hours': 10.0})],
 [('draw after midnight',
   {'dose': '20:00', 'draw': '07:00', 'level': '4'},
   {'interval': 'q36h', 'hours': 11.0}),
  ('exactly 6 hours', {'dose': '08:00', 'draw': '14:00', 'level': 10}, {'interval': 'q36h', 'hours': 6.0}),
  ('exactly 14 hours',
   {'dose': '06:30', 'draw': '20:30', 'level': '7'},
   {'interval': 'HOLD_RECHECK', 'hours': 14.0}),
  ('beyond 14 hours',
   {'dose': '06:00', 'draw': '20:50', 'level': '1'},
   {'interval': 'OUT_OF_RANGE', 'hours': 14.83}),
  ('fractional hour reading',
   {'dose': '08:00', 'draw': '18:35', 'level': '3.95'},
   {'interval': 'q36h', 'hours': 10.58}),
  ('on the q24 line', {'dose': '08:00', 'draw': '17:00', 'level': '4.5'}, {'interval': 'q24h', 'hours': 9.0}),
  ('late draw mid-band',
   {'dose': '07:00', 'draw': '17:00', 'level': 8},
   {'interval': 'q48h', 'hours': 10.0})]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
draw after midnight	`{'hours': 7.0, 'interval': 'q24h'}`	`{'hours': 7.0, 'interval': 'q24h'}`	Passed
exactly 6 hours	`{'hours': 6.0, 'interval': 'q24h'}`	`{'hours': 6.0, 'interval': 'q24h'}`	Passed
exactly 14 hours	`{'hours': 14.0, 'interval': 'q24h'}`	`{'hours': 14.0, 'interval': 'q24h'}`	Passed
beyond 14 hours	`{'hours': 14.17, 'interval': 'OUT_OF_RANGE'}`	`{'hours': 14.17, 'interval': 'OUT_OF_RANGE'}`	Passed
fractional hour reading	`{'hours': 10.25, 'interval': 'q36h'}`	`{'hours': 10.25, 'interval': 'q36h'}`	Passed
on the q24 line	`{'hours': 9.0, 'interval': 'q24h'}`	`{'hours': 9.0, 'interval': 'q24h'}`	Passed
late draw mid-band	`{'hours': 10.0, 'interval': 'q24h'}`	`{'hours': 10.0, 'interval': 'q24h'}`	Passed

SHA-256 / 2610dc4977328a57b6caa48161e37300278a250a846162b1167135ce78a4416c

Verification & scope

A deterministic toy software model with explicitly stipulated thresholds and formulas; it is not clinical guidance, not a validated medical calculator, and makes no claim of conformance to any published protocol. Numbered variants vary patient and order inputs. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:47:23.302837+00:00.

Case digest / 9d5f1b031d1ee4365a9d56bb6957406c223d64ba0ec732416415ba8c65de9869