The SiliconExpert Connect BOM Risk Apps enables you to detect part issues early in the design development, thereby reducing time-to-market delays. Definitions described in this Cheat Sheet help you interpret the reporting categories used in the reports generated by this SiliconExpert app.

  1. Grade
    Each BOM part is evaluated and assigned a “grade” which conveys the level of usage risk. Categories of part risk are:
    • A: Low Risk
    • B: Medium Risk
    • C: High Risk
    • D: Unknown


  2. Overall Risk
    The Overall Risk briefly summarizes and reports the BOM part risk based on the combination of all part categories. This provides a comprehensive analysis of BOM components.



    • SiliconExpert Grade
      A five-star SiliconExpert grading system that grades parts based on their usage in the industry.

    • Crosses
      Reports the cross references or similar alternative components.
  3. Lifecycle 
    Reports the BOM part risk based on the current product life cycle status provided by the component manufacturer.



    • Y-to-EOL
       
      Reports the number of years until component is end-of-life.

    • Obsolescence PCNS
       
      Reports the number of obsolescence product change notices from the manufacturer.

    • Crosses
       Reports the cross references or similar alternative components.
  4. Multisourcing Risk
    Reports the risk based on the number of suppliers the component can be sourced from.
    • Crosses
      Reports the cross references or similar alternative components.


  5. Compliance Risk
    Reports the risk based on the components adhering to environmental and government regulations.



    • RoHS
      Reports the RoHS compliance, directive, and exemption if applicable
      RoHS stands for the "Restriction of Hazardous Substances."

    • REACH
      Reports the REACH compliance information (unaffected or affected). REACH represents the “Registration, Evaluation, Authorization, and Restriction of Chemicals.”

    • Crosses
      Reports the cross references or similar alternative components.

  6. Inventory Risk
    Reports the risk based on the market availability of components.



    • Inventory
      Reports the number of distributors where the component is available for purchase

    • Budgetary Prices
      Reports the minimum and average prices of the component.

    • Crosses
       
      Reports the cross references or similar alternative components.

  7. Crosses
    Reports the cross references or similar alternative components.



    • Lifecycle
      Reports the status of the component from the following options:
      Active: In full production by the manufacturer
      Obsolete: No longer in production by the manufacturer
      LTB: Last Time Buy (Phase-Out Stage)
      Unconfirmed: Unknow

    • RoHS
      Reports the RoHS compliance, directive, and exemption if applicable. RoHS represents the “Restriction of Hazardous Substances.”

    • Y-to-EOL
      Reports the number of years until component is end-of-life.

    • REACH
       
      Reports the REACH compliance information (unaffected or affected). REACH represents “Registration, Evaluation, Authorization, and Restriction of Chemicals.”
       
    • Cross
       
      Reports how similar the cross is to the original component:
      A: pin-to-pin drop in replacement with the exact package and parametric features
      B: pin-to-pin compatible with minor differences in package dimensions or parametric features
      C: pin-to-pin compatible with major differences in package dimensions or parametric features
      D: not pin-to-pin compatible
       
  8. Difference
     
    Reports the differences between the original part and the alternative. 

  9. Additional Environmental Definitions

    RoHS
     
    RoHS stands for “Restrictions of Hazardous Substances”. The EU RoHS Directive 2002/95/RC requires certain parts be free (except for trace impurities) of mercury, cadmium, hexavalent chromium, PBB, PBDE, and leads as of July 1st, 2006. Certain exemptions are allowed like lead used as an alloying additive in copper, steel, and aluminum.

RoHS Exemption
 Exemptions to RoHS are granted to narrowly-defined applications for which the elimination of the prohibited substance is technically or scientifically impracticable or when the only available substitution produces more negative than positive benefits to the environment, health, or consumer safety.

Halogen Free
 
The halogens are five non-metallic elements found in Group 7 of the periodic table. The term “halogen” means “salt-former” and compounds containing halogens are called “salts”. The Halogens are: Flourine, Chlorine, Bromine, Iodine, and Astatine.

REACH
REACH is a regulation of the European Union which stands for “Registration, Evaluation, Authorization, and Restriction of Chemicals”. Adopted to improve the protection of human health and the environment from the risks that can be posed by chemicals while enhancing the competitiveness of the EU chemicals industry. It also promotes alternative methods for the hazard assessment of substances in order to reduce the number of tests on animals and requires substances manufactured in or imported into the European Union to be registered. For the full list of substances that are a candidate for REACH regulation: 

http://echa.europa.eu/candidate-list-table.

SVHC
 
“Substances of Very High Concern” under the REACH regulation.

ODC
 
ODC (Ozone Depleting Chemicals) is the list of substances banned by EPA used to describe various chemicals that deplete the ozone layer of our atmosphere.