Insulin Glargine, 100 units/mL, 10 mL Vial

EndocrineEssential, 95% service targetPrimary vendor Harborline Pharmaceuticals, lead 1 day, ordered every 3 days00088222033

Stock position

On hand
110 vial15.8 days of supply
On order
10 vialfirst arrives Mon Sep 14
Forecast rate
7.0 vial/daynext 30 days
Demand over 4 days
31 viallead time plus review period
Safety stock
11 vialempirical 95th percentile of forecast error
Reorder point
42 vialabove
Stockout
Wed Sep 30
Recommended order
noneby Mon Sep 28
Inventory value
$7,150at $65.00 per vial

How the forecast was made

Exponential smoothing14% weekly error, unbiased8% 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 14% on average (38% day by day), and it showed no systematic bias. A same-weekday-last-week guess would have been off by 15%.

Report card, week by week

Week ofUsedForecastErrorError %
Tue Jul 214648+24%
Tue Jul 285248-48%
Tue Aug 45148-36%
Tue Aug 113448+1441%
Tue Aug 184048+820%
Tue Aug 255348-59%
Tue Sep 16248-1423%
Tue Sep 84648+24%
All 8 weeks384387+31%

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
01123todayreport 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 11runs out Wed Sep 30tomorrowMon Oct 5
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
L00087110Thu Nov 25437$65.000 vial · $0

Vendors and prices, last 90 days

VendorPart numberVendor descriptionSells byPaid per vialInvoices90-day spendPairing
Harborline Pharmaceuticals00088222033INSULIN GLARGINE 100 [IU]/ML VIAL EAEA of 1$59.5932$27,234NDC exact