Suction Catheter, 14 Fr, Closed System

RespiratoryEssential, 95% service targetPrimary vendor Meridian Medical Supply, lead 1.5 days, ordered every 7 daysMMS-781427

Stock position

On hand
1,391 each17.8 days of supply
On order
0 eachnothing open
Forecast rate
78.3 each/daynext 30 days
Demand over 9 days
720 eachlead time plus review period
Safety stock
115 eachempirical 95th percentile of forecast error
Reorder point
835 eachabove
Stockout
Fri Oct 2
Recommended order
noneby Tue Sep 29
Inventory value
$974at $0.70 per each

How the forecast was made

Exponential smoothing8% weekly error, unbiased25% 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 (28% day by day), and it showed no systematic bias. A same-weekday-last-week guess would have been off by 10%.

Report card, week by week

Week ofUsedForecastErrorError %
Tue Jul 21560542-183%
Tue Jul 28608542-6611%
Tue Aug 4557542-153%
Tue Aug 11639542-9715%
Tue Aug 1854254200%
Tue Aug 25498542+449%
Tue Sep 1472542+7015%
Tue Sep 8568542-265%
All 8 weeks4,4444,339-1052%

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
090180todayreport 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 115runs out Fri Oct 2tomorrowWed Oct 7
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-781427SUCT CATH 14 FR CLSD SYS CS/50CS of 50$0.6213$3,163AI 0.69
Northwind Health DistributionNW2373805Suction Catheter, 14 Fr, Closed System - 50/CsCS of 50$0.6114$1,470AI 0.88