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Conference 7.286::fddi

Title:FDDI - The Next Generation
Moderator:NETCAD::STEFANI
Created:Thu Apr 27 1989
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2259
Total number of notes:8590

104.0. "MTBF of our products?" by FRAMBO::WILTRUD () Mon Aug 13 1990 07:38

    Hallo,
    
    Does anybody know the MTBF/MTTR from the DECconcentrator500 and the
    DECBridge500?
    While the concentrator is a single point of failure for all connected
    SAS the Mean Time between Failure is a interesting point. Does anybody
    knows what MTTR stands for?
    
    Thanks Wiltrud
T.RTitleUserPersonal
Name		DateLines
104.1Mean Time To RepairGLDOA::TREMBATHPeter. Call when you get work...Mon Aug 13 1990 12:1211
    MTTR is "mean time to repair". Suggest looking in the FIP " Field
    Implementation Plan" for the MTTR and MTBF specs for the
    DECconcentrator. FIP's can be found in a system called PMIS which is
    accessable under VTX. It's use is open to all and is menu driven. PMIS
    also has the FIP's for all VES products. I suggest that this info not
    be given to customers unless absolutely necessary. If the MTTR/MTBF
    numbers are good, then you sell the box, but not the service contract. 
    If the numbers are bad then you don't sell either the box or the contract. 
    
    Regards,
    Pete
104.2MTBF data is classified DIGITAL CONFIDENTIALBAGELS::LEVYThu Aug 16 1990 14:103
    Also, note that Digital does not publish MTBF data, and that it is 
    considered proprietary information. It can only be shared with
    customers under a non-disclosure agreement.
104.3Why NOT sell service contracts??!!CSCOA3::LANGDON_DFri Oct 05 1990 15:0028
    I just started reading this file,,
    
    SET FLAME ON>
    
       DEC wants revenue.....NO,make that DEC NEEDS revenue !!!!
    
    So why suggest that we NOT sell service contracts on equipment with
    good MTBF #s?? Service contracts on "good" equipment are the revenue
    producers that allow us to offer service contracts on equipment that
    do not have such good numbers.
    
    SET FLAME OFF>
    
       A device with a "low" MTBF may mean more fequent service required,
    but don't forget that the figure is  *MEAN*- time- between- failures.
    It doesn't mean that every box will fail after 'n' hours,,it just 
    means that the nature of the product,and its expected usage, will 
    probably result in the stated MTBF. 
       The MTTR is "REPAIR" time,,how long the box is expected to be down
    AFTER service is begun on it.It doesn't take into account the time
    needed to isolate the trouble to the unit.
    
      To repeat myself,,PLEASE don't advise people not to sell service
    contracts,,service contracts are REVENUE if we manage them right...
    
    Doug Langdon
    IN-DEC Customer Service
    Atlanta CSC networks