Emesis Bag, 1000 mL, Graduated

Patient CareNon-essential, 90% service targetPrimary vendor Meridian Medical Supply, lead 1.5 days, ordered every 7 daysMMS-241926

Stock position

On hand
2,658 each23.6 days of supply
On order
192 eachfirst arrives Tue Sep 15
Forecast rate
112.5 each/daynext 30 days
Demand over 9 days
1,032 eachlead time plus review period
Safety stock
25 eachempirical 90th percentile of forecast error
Reorder point
1,057 eachabove
Stockout
Sat Oct 10
Recommended order
noneby Wed Oct 7
Inventory value
$797at $0.30 per each

How the forecast was made

Exponential smoothing5% weekly error, over-forecast49% 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 (20% day by day), and it over-forecast by 3% overall. A same-weekday-last-week guess would have been off by 9%.

Report card, week by week

Week ofUsedForecastErrorError %
Tue Jul 21853805-486%
Tue Jul 28810805-51%
Tue Aug 4802805+30%
Tue Aug 11689805+11617%
Tue Aug 18723805+8211%
Tue Aug 25788805+172%
Tue Sep 1785805+203%
Tue Sep 8802805+30%
All 8 weeks6,2526,440+1883%

Weekly totals in each. 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
0167335todayreport card windowThu Mar 19Wed Oct 14
actual forecast, 80% and 95% range what the model said during the report card windoweach/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 25runs out Sat Oct 10tomorrowThu Oct 15
Projected on hand, each: today's stock plus open orders on their expected dates, minus the forecast, day by day.

Vendors and prices, last 90 days

VendorPart numberVendor descriptionSells byPaid per eachInvoices90-day spendPairing
Meridian Medical SupplyMMS-241926EMESIS BAG 1000 ML GRAD BX/24BX of 24$0.2912$1,912AI 1.00
Northwind Health DistributionNW7865797Emesis Bag, 1000 mL, Graduated - 24/BxBX of 24$0.2914$964AI 1.00