False Alarm Rates At Evolv's Biggest School Customer
Two months ago, Evolv's biggest customer, Charlotte-Mecklenburg School District, publicly said it is eliminating metal binders in its schools as the district is trying to decrease false prevalent alarms. But what is the actual false alarm rate in CMS schools?
IPVM obtained email records between Evolv and the Charlotte-Mecklenburg School District. In this report, we analyze Evolv's false alarm rate, how it changes with sensitivity, and what the district is doing to reduce the rate.
Executive *******
***** ********* *** ******* ****** "**%", "25-33%", *** "************* **%" ***** ***** rates, *** / ***** ***** ******* showed. ***** *** ***** *** ***** are ********** ** ***** ****** **** other ***** ****** ********* **********, *** 75% **** ** *** ******* **** IPVM *** **** ** ****.
*** ******** ** *******, *** **** believes *********'* ******* *********** *******, "*,"****** **** **** ***** ***** **** despite *** ****** ***** *********** **** Chromebooks *** ******** *****. **** **** not **** *** ***** *** **** setting "*," *** **** * **** false ***** **** ***** ***** ********* impractical *** *******, ****** "*" ***** resolve *****'* *****-******* *******.
***** *** **% ***** ***** **** is ************* ***** **** **%, ** was **** ******** ******* *** ****-****** method, ******* ******* * *** ** 5 ******** ******. ***** ** ***** throughput ******* ****** ** ***' *** at *** **** *** *** ****** of ******* ***** **** ******** ****, the ****-**-***** ***** ***** ** ** least *: *,***.
*******, *** ** ******** ******* ** decrease ***** ******, ** *** ***** records ****. *** ******** ** *********** metal **** *******, ******* **** ***** and ****** ** **** ** ******* Chromebook *****, *** ********** ******** ***** alarms **** *** **********. ** ******* to ** **** **** *******, ** any, ** **** **** ** *** false ***** ****, ******.
Background: ***** ** ***
*** ************ ***** ***** ** ******* *** ** *** "****** ******* customer" *** *** *** *****, ** an ***** ********* **** ****** * May **** ******** **********. ** ** April ****, *** ******** *** ***** $16.5 ******* ** *****, *** * local **** ******, *** ***** ****, CMS ********* ********** ***** (** ** MSRP ** ~$***,*** *** **** *****, 160 ***** ****** ** ~$** *******).
False ***** *****
******** **** ***' ****** ***** **** mentions ** *** ***** ****** ** various *******:
*** *******, *** *** ***** ***** with ***** ***** ***** **** ***** school ********* *********** ** ****-**:
***********
******* ****** ****** ******** *******, **** as ***********, *******, ******** *****, ***., is * ****** ********** **** ** Evolv *******. ******, ** *** ****** (shown *****), **** ********** *** *********, as *** ********* ****:
***** *** ****** *** ******* **** we **** *** ***** ** ******* to ***pass ****** ******, it is working great and the staff loves it (very motivated) [19% false alarm rate]
** *** **** ** ***** ****** these *** * ****, *** ***** additional *********** ** **** *********beyond *** **********, ********, ****, etc.? [75% false alarm rate] [emphasis added]
********, *****, ***** ** *** ***********, even ********** ******* ******* ****** ** conveyor ***** ** ********** *** *********, as ** ******* **** **-** ************* *****:
******* *****, *******, *** ******* *** struggling **** ***** ****** ** ***** items.
75% ***** **** *** ******* "*"
***** *** ******** ** ******* ** our *********, **** ******** **** *** fact *** ****** *** **** * high ***** ***** **** ******* ***** the ****-****** ****** ********* **** ******* "G" *** ****.
******, ***** ******* **** **** *** purchased ****** **** (** ***** ****** between ***** ******) **** *** ** used **** **** ******* "*" *** discussed ** **** ******* *** ******* is ** ** ****:
**** * **** ***** ***** **** with ******* "*" ** ********, ** in *** ** *** ********, ***** disclosed **** ***** "*" **** ****** in * "************* ****** ***** ***** rate." ********** **** ********* ** ** Evolv ************** ****** *** *******, ********** that ***** **** ***** **** ** much ******* *******.
*** **** ******* ** ******* "*", see***** ******** **** ** * ***** Detector **** *** "*" *********** *************** ********* "**** *********" ******* *********.
** ***** ***** *** ******** ****** the **** **** ***** ******* ********* is ****** **** *******-***** ********* *** metal ******** *********, **** * **** false ***** **** **** *** ****-****** method **** *** ***** *** *******'* value ***********.
Concerns **** **** ***** ***** *****
***** **** ****** ** ***** ***** Express **** **** ****** *** ****** a **** ******** ********* **********, * high **** ** ***** ****** **** also **** ** ***** ******* (* boy *** ***** **** ******), ***** operators *** **** ******** ** ***** alarms.
***** *** ***** ********** ** **,*** students (** *** *** ***** ******* disclosed ****** *** **** **** ****) and ~*** ******* ***** ** ****** last **** (********* *** ***** ********* ******), ** * **% ***** ***** rate, *** *** * ****-**-***** ***** ratio ** ~ *: *,***. *** graphic ***** *********** **** *****:
CMS ****** ** ******* ***** ******
*******, ***** ** ***' ***** *******, the ******** ** ******** ** * conversation **** *** ********** ********* ***** the ***** ***** ***** *** ** taking ***** ** ******** *** ****** of ****** ************* ***** **** *******. ************, **** *** ******** ****** between ******, ***, *** ***** ** CMS ** ****** ** ******* *** Chromebook ***** *****. **** ***** ** cover **** ** * ******** ******.
******* **** ************* ** "***** *****" and "***** *****" . ** * correct ** ******* **** * "***** alarm" ****** **** ** ***** ** signaled ******* *** ********** ****** ***** found ****** * ********** ******. **********, a "***** *****" ******* **** *** detection ***** ** ******* ** ****** that ****** *** *****...***** ***** ******* a **** ******.
********* *** ***** *******, ** ** equipped **** ***** ********* ************ **** can *** ******** ******* *** *** results ** **************, ******* ** ****** access ******* *******? ** **** ***** capability ********* ** ** ******?
** *** ******* ** *** ************* of ***** *********, ** ******* *******, there *** ******* ******* *********. *** challenge **** ** ********* *** ********** of *********, ***** ********** ***** ********* events **** ** *** *****. **** makes ** ********* ** ************ *********** the ********' ************* ** ********* ***** primary ******** **********. *** ******* **** me ** *******?
******, **** ****! **'* ******** **** this *** **** ***** ** *** multiple *****, $**+ ******* *** ***** are ***** **** ********.
**'* **** *********** **** ********* **** this ****** ******** ** ********* *** manufacturers ***** ****** ***** ******* *********** problems.
********* ****** **** ** ** ****** due ********* ****** ******* ********** **** such ******.