#164 List of unique parts contains too many parts

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opened 3 years ago by Michael Schloh von Bennewitz · 2 comments

List of unique parts contains too many parts

Problem environment

The number of unique parts in a design defines the complexity and human intervention during assembly.

Steps to reproduce

  1. Refer to the bill of materials and parts list
  2. Count the number of unique SMT parts

Expected result

Any parts more than a mid fourty quantity threshhold are considered of urgent need.

Actual result

Several parts in the bill of materials could possibly be reduced by equivalent substitution.

Severity level

This is low priority because project requirements do not mandate in house assembly.

# List of unique parts contains too many parts ## Problem environment The number of unique parts in a design defines the complexity and human intervention during assembly. ## Steps to reproduce 1. Refer to the bill of materials and parts list 1. Count the number of unique SMT parts ## Expected result Any parts more than a mid fourty quantity threshhold are considered of urgent need. ## Actual result Several parts in the bill of materials could possibly be reduced by equivalent substitution. ## Severity level This is **low priority** because project requirements do not mandate in house assembly.
Michael Schloh von Bennewitz added the
enhancement
label 3 years ago
Michael Schloh von Bennewitz added this to the Postproject catchall milestone 3 years ago

Consolidate R9 pullup from 100K to 10K, R11 and R12 pullups from 3K9 to 10K, R13 pullup from 1K to 10K, and R14 and R15 pullups from 4K7 to 10K. This reduces unique parts by four.

Consider consolidating all load capacitors of both crystals C18, C19, C95, and C96 to the same value, such as 12pF or 15pF. This would reduce unique parts by one.

Consider (ask the reference design publishers) consolidating FB1 at 120Ω and FB2 at 470Ω, to reduce unique parts by one.

Consolidate *R9* pullup from 100K to 10K, *R11* and *R12* pullups from 3K9 to 10K, *R13* pullup from 1K to 10K, and *R14* and *R15* pullups from 4K7 to 10K. This reduces unique parts by four. Consider consolidating all load capacitors of both crystals *C18*, *C19*, *C95*, and *C96* to the same value, such as 12pF or 15pF. This would reduce unique parts by one. Consider (ask the reference design publishers) consolidating *FB1* at 120Ω and *FB2* at 470Ω, to reduce unique parts by one.

Solved in 47cf21d, with exception to FB1/FB2 pending technical support from the MCU manufacturer.

Solved in 47cf21d, with exception to FB1/FB2 pending technical support from the MCU manufacturer.
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