Famotidine Injection, 20 mg/2 mL Vial

GastrointestinalEssential, 95% service targetPrimary vendor Harborline Pharmaceuticals, lead 1 day, ordered every 3 days00641602110

Stock position

On hand
1,982 vial16.7 days of supply
On order
0 vialnothing open
Forecast rate
118.6 vial/daynext 30 days
Demand over 4 days
515 viallead time plus review period
Safety stock
160 vialempirical 95th percentile of forecast error
Reorder point
675 vialabove
Stockout
Thu Oct 1
Recommended order
noneby Tue Sep 29
Inventory value
$1,784at $0.90 per vial

How the forecast was made

Exponential smoothing14% weekly error, under-forecast77% worse 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 14% on average (27% day by day), and it under-forecast by 14% overall. A same-weekday-last-week guess would have been off by 8%.

Report card, week by week

Week ofUsedForecastErrorError %
Tue Jul 21672620-528%
Tue Jul 28639620-193%
Tue Aug 4700620-8011%
Tue Aug 11668620-487%
Tue Aug 18735620-11516%
Tue Aug 25762620-14219%
Tue Sep 1674620-548%
Tue Sep 8887620-26730%
All 8 weeks5,7374,957-78014%

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
0117233todayreport 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 160runs out Thu Oct 1tomorrowTue Oct 6
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
L001041,982Mon Sep 13364$0.900 vial · $0

Vendors and prices, last 90 days

VendorPart numberVendor descriptionSells byPaid per vialInvoices90-day spendPairing
Harborline Pharmaceuticals00641602110FAMOTIDINE 10 MG/ML VIAL EAEA of 1$0.8131$8,092NDC exact