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  QREBS-1 
  5
   
   
  QREBS-1 
   Despite the uniformity which mass production techniques impart to 
  their output, individual pieces of equipment can vary widely due to the 
  differences between manufacturers, and the different emphases that 
  they give to design and quality. 
  QREBS-1 
   
  THE QREBS EQUIPMENT EVALUATION SYSTEM 
   The QREBS (pronounced “krebs”) system evaluates pieces of equipment for five essential characteristics: Quality, 
  Reliability, Ease Of Use, Bulk (or Burden) and Safety.  
   Objects. Any item which is subject to QREBS is called an object. It may alternatively be called a device, a piece of 
  equipment, a machine, an item, or an apparatus. While QREBS is primarily concerned with devices and machinery, it can also 
  be used (judiciously omitting some parts of the system) with plants and animals, artwork, even books, drama, or music. 
   Multi-Component Objects. Where several objects are combined into a larger item (for example, components combined to 
  become a groundcar), the proper use of the QREBS system is to treat each major subsystem separately. 
   
  Q QUALITY 
  2D-2 Description 
  Mod 
  Period 
   
  0 Very bad 
  - 5 
  Minutes 
   
  1 Bad 
  - 4 
  Hours 
   
  2 Poor 
  - 3 
  Days 
   
  3 Lesser 
  - 2 
  Weeks 
   
  4 Below average 
  - 1 
  Months 
   
  5 Average 
  0 
  Six Months 
   
  6 Better than some +1 
  One Year 
   
  7 Better than many +2 
  Two Months 
   
  8 Very good 
  +3 
  Three Years 
   
  9 Better than most 
  +4 
  Four Years 
   10 Excellent 
  +5 
  Ten Years 
   11 Superb 
  +6 
  Twenty Years 
   12 Masterpiece 
  +7 
  Centuries 
   
   
   
   Quality is a measure of the 
  workmanship of an object. It directly 
  reflects the Period between 
  reliability downgrades. 
   Quality= 2D-2. Or as specified 
  otherwise. 
   Quality Mod= Q minus 5. 
  Converted to Flux for use as a Mod. 
   When an Object fails, reduce its 
  Quality by -1. 
   
   
   
   
   Period is the time between 
  Reliability downgrades.  
   As each Period ends, reduce 
  Reliability for the object by -1. 
   For example, an Average quality 
  object with a Period of One Year is 
  reduced in Reliability -1 every Year. 
   When an Object fails, reduce its 
  Period -1. 
   
   
   
   
  R RELIABILITY 
  Value 
  Description 
  - 5 Very unreliable 
  - 4 More unreliable 
  - 3 Unreliable. 
  - 2 Somewhat unreliable 
  - 1 Slightly unreliable. 
    0 Reliability neutral. 
  +1 Better than some. 
  +2 Better than many. 
  +3 Reliable. 
  +4 More reliable. 
  +5 Very reliable. 
   
  Reliability measures the 
  dependability of an object. 
  Reliability = Flux. Or as 
  specified otherwise. 
  Reliability Degrades. 
  Reliability degrades -1 per 
  Period. 
   
   
   
   
   
   
  Reliable / Unreliable 
   
  E EASE OF USE 
  Value 
  Description 
  - 5 Very difficult to use 
  - 4 More difficult to use 
  - 3 Hard to use. 
  - 2 Somewhat hard to use 
  - 1 Slightly difficult to use. 
    0 Ease of use neutral. 
  +1 Better than some. 
  +2 Better than many 
  +3 Easy to use. 
  +4 Easier to use 
  +5 Very easy to use. 
   
  Ease of Use measures 
  the facility with which a piece 
  of equipment can be put into 
  operation. 
  Ease of Use = Flux. Or 
  as specified otherwise. 
  Large Equipment: Ease 
  of Use refers to individual 
  systems rather than to the 
  craft or vehicle or assembly 
  as a whole. 
   
   
  EaseOfUse / HardToUse 
   
  B BULK / BURDEN 
  Value 
  Description 
  - 5 Very easy-to-carry. 
  - 4 Easier to carry  
  - 3 Easy to carry. 
  - 2 Better than many  
  - 1 Better than some. 
    0 Burden neutral. 
  +1 Slightly un-ergonomic. 
  +2 Somewhat hard to carry 
  +3 Difficult to carry. 
  +4 More burdensome 
  +5 Very burdensome 
   
  Burden measures the 
  difficulty of carrying or using 
  a piece of equipment. It 
  expresses how ergonom-
  ically well-fitted to use the 
  item is. Alternatively, it 
  measures the bulk or 
  unwieldiness of an object. 
   Burden = Flux. Or as 
  specified otherwise. 
   
   
   
  Burden/Ergonomic 
  Bulky/Compact 
  S SAFETY 
  Value 
  Description 
  -5 
  Very hazardous. 
  -4 
  More hazardous 
  -3 
  Hazardous. 
  -2 
  Somewhat hazardous. 
  -1 
  Slightly hazardous. 
    0 Safety neutral. 
  +1 Better than some. 
  +2 Better than many 
  +3 Safe to use. 
  +4 Safer to use 
  +5 Very safe. 
   
  Safety measures the 
  inherent danger presented 
  by an object when in use. 
  Safety = Flux. Or as 
  specified otherwise. 
   
   
   
   
   
   
   
   
  Safe / Hazardous 
   
   
   
  
SOURCE: textdata/thevault/Traveller/09 - Traveller5/Traveller5/T5 Underlying PDFs/T5=1501 QREBS Chart 1.pdf