Hydromorphone HCl Injection, 1 mg/mL, 1 mL Vial

Analgesia & AnesthesiaVital, 99% service targetPrimary vendor Harborline Pharmaceuticals, lead 1 day, ordered every 3 days00641616910

Stock position

On hand
1,618 vial17.8 days of supply
On order
136 vialfirst arrives Tue Sep 15
Forecast rate
90.6 vial/daynext 30 days
Demand over 4 days
391 viallead time plus review period
Safety stock
115 vialempirical 99th percentile of forecast error
Reorder point
506 vialabove
Stockout
Sun Oct 4
Recommended order
noneby Thu Oct 1
Inventory value
$2,103at $1.30 per vial

How the forecast was made

Exponential smoothing8% weekly error, unbiased54% 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 8% on average (25% day by day), and it showed no systematic bias. A same-weekday-last-week guess would have been off by 18%.

Report card, week by week

Week ofUsedForecastErrorError %
Tue Jul 21551632+8115%
Tue Jul 28602632+305%
Tue Aug 4695632-639%
Tue Aug 11613632+193%
Tue Aug 18571632+6111%
Tue Aug 25665632-335%
Tue Sep 1593632+397%
Tue Sep 8714632-8211%
All 8 weeks5,0045,052+481%

Weekly totals in vial. 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
0102204todayreport card windowThu Mar 19Wed Oct 14
actual forecast, 80% and 95% range what the model said during the report card windowvial/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 115runs out Sun Oct 4tomorrowFri Oct 9
Projected on hand, vial: 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
L00041729Thu Jan 6479$1.300 vial · $0
L00040889Sat Apr 1565$1.300 vial · $0

Vendors and prices, last 90 days

VendorPart numberVendor descriptionSells byPaid per vialInvoices90-day spendPairing
Harborline Pharmaceuticals00641616910HYDROMORPHONE HCL 1 MG/ML VIAL EAEA of 1$1.2231$7,737NDC exact
Cobalt Rx DistributorsCRX-10800HYDROM 1 SDV 1CTEA of 1$1.2414$3,356reviewed 0.90