IEEE Power Electronics Magazine - December 2021 - 20

and repeatability. The ticket provides the reasoning to production
to justify change, while versioning locks in a design
and ensures repeatability.
Production Records
Engineers responsible for the initial document design are
also the ones that first create new records for components
and BOMs. Companies that clearly separate engineering,
manufacturing, and planning will often end up with duplicated
record keeping systems that are unsynchronized and
prone to error. Magna-Power's vertical integration along
with its centralized records affords data sharing among
design tools and manufacturing equipment, the advantages
of which are discussed in this section.
The most important record strategy an engineer can take
FIG 8 Flush cut leads to prevent arc points.
when entering new components is to avoid entering new components
as much as possible. The engineer should use existing
components in the supply chain and introduce new components
only when it is a necessity. Is that 1% resistor really
needed, or will an existing 5% resistor from the stockroom
suffice? Much effort goes into vetting vendors, validating
authorized distributors, negotiating pricing, setting reorder
levels, and inventory control records. On the manufacturing
side, pick and place machines have limited feeder lanes. Part
consolidation reduces the reel changeover, which reduces
labor, and less handling lowers chances for picking errors.
To encourage material reuse in new designs, Magna-Power
integrated its central database into its schematic and layout
software. In the schematic design, only the active components
are shown, along with live inventory levels, as shown
in Figure 10. Dragging the part into the schematic adds the
footprint, symbol, and around ten associated properties-its
simplicity encourages existing components reuse. Custom
software was programmed to take a schematic and inject
it back into the database. For complicated boards, like the
company's new generation digital control board, which contains
over 400 components, the BOM was injected into the
enterprise resource planning software in one button click.
As a design matures, engineering may make tweaks
FIG 9 Internal engineering ticket linked to document changesets.
to fix problems or implement features, or planning may
replace components as they become obsolete or hard to
acquire. In these situations, human error will inevitably
occur; engineering may forget to update a BOM or planning
may fail to tell engineering to revise a schematic. Such
FIG 10 Schematic design using live inventory data.
20 IEEE POWER ELECTRONICS MAGAZINE z December 2021

IEEE Power Electronics Magazine - December 2021

Table of Contents for the Digital Edition of IEEE Power Electronics Magazine - December 2021

Contents
IEEE Power Electronics Magazine - December 2021 - Cover1
IEEE Power Electronics Magazine - December 2021 - Cover2
IEEE Power Electronics Magazine - December 2021 - Contents
IEEE Power Electronics Magazine - December 2021 - 2
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