Acetaminophen Injection, 1000 mg/100 mL Bag

Analgesia & AnesthesiaEssential, 95% service targetPrimary vendor Harborline Pharmaceuticals, lead 1 day, ordered every 3 days00143938610

Stock position

On hand
1,274 bag22.1 days of supply
On order
0 bagnothing open
Forecast rate
57.5 bag/daynext 30 days
Demand over 4 days
254 baglead time plus review period
Safety stock
36 bagempirical 95th percentile of forecast error
Reorder point
289 bagabove
Stockout
Wed Oct 7
Recommended order
noneby Mon Oct 5
Inventory value
$10,447at $8.20 per bag

How the forecast was made

Exponential smoothing5% weekly error, unbiased58% better than naive

A weighted recent average that learns the weekday pattern and any trend. Recent days count more than old ones.

Report card: the model was fit on history up to Tue Jul 21 and scored on the 56 days after. Weekly totals were off by 5% on average (23% day by day), and it showed no systematic bias. A same-weekday-last-week guess would have been off by 12%.

Report card, week by week

Week ofUsedForecastErrorError %
Tue Jul 21390400+103%
Tue Jul 2840040000%
Tue Aug 4377400+236%
Tue Aug 11348400+5215%
Tue Aug 1840040000%
Tue Aug 25433400-338%
Tue Sep 1416400-164%
Tue Sep 8424400-246%
All 8 weeks3,1883,200+120%

Weekly totals in bag. Error is forecast minus what was used, so a positive number means the model ran high. This window was hidden from the model when it was fit.

Demand forecast

last 180 days and the next 30
060121todayreport card windowThu Mar 19Wed Oct 14
actual forecast, 80% and 95% range what the model said during the report card windowbag/day

The model only knows the usage history. If you know something it does not, a coming surge, a new service line, a product being dropped, adjust the forecast and the stock math follows.

Projected on hand

0safety stock 36runs out Wed Oct 7tomorrowMon Oct 12
Projected on hand, bag: today's stock plus open orders on their expected dates, minus the forecast, day by day.

Lots and expiry

Earliest-expiry-first simulation against the forecast. Waste is what remains in a lot on its expiry date.

LotQuantityExpiresDaysUnit costProjected waste
L00047548Thu Feb 25164$8.200 bag · $0
L00046726Fri May 14242$8.200 bag · $0

Vendors and prices, last 90 days

VendorPart numberVendor descriptionSells byPaid per bagInvoices90-day spendPairing
Harborline Pharmaceuticals00143938610ACETAMINOPHEN 1000 MG/100ML BAG EAEA of 1$7.5130$38,945NDC exact