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What is PCB BOM management? How to streamline production with It?

By Mer-Mar Electronics | Date posted: | Last updated: October 11, 2022
PCB bom management

The beginning of the PCB manufacturing process involves listing down the parts, sub parts assemblies & more that will be required in production. In other words, creating a Bill of Materials or BOM, as it is commonly known as.

A Bill of Material is essentially a detailed list of all parts that are used in production. The manufacturer needs to refer to the BOM at various stages to ensure that all inventory is in place and the production is seamless. Proper PCB BOM management plays an important role in:

  • Management of Inventory
  • Product Lifecycle Management
  • Quality Control, and more.

Use of BOM in manufacturing

For a robust BOM to be built, it requires input from various departments. While the engineering team can offer specifications of the product, the purchase teams facilitate optimal costs. The marketing team uses it to ensure that the functionality is communicated to the customer.

Typical information in a BOM includes:

  • Part Number
  • Part Name
  • Quantity
  • Description
  • Procurement Phase, and more.

YOU MAY ALSO LIKE: How to create PCB BOM (Bill of Materials)?

BOMs, in turn, can be single-level or multi-level. The key difference between the two is that a multi-level BOM also lists the child parts that are needed to make the parent parts, which in turn, go into the assembly of the final product.

Need for PCB BOM management & ways to streamline production with it!

With several departments requiring access to BOM, the old paper documents or even spreadsheets aren’t adequate. Also, paper documents lend themselves to manual errors. Besides in case different departments need to make revisions there is always the fear of duplication not to mention the fact that tracking of different versions is a huge challenge.

PCB BOM Management to Streamline Process

What comes in handy therefore are cloud based BOM solutions. BOM Management goes a long way in streamlining production. Here is how:

1. Centralized BOM Management System Control

Different departments require access to the BOM. It is important therefore to centralize the management system control. If this is done, you can create a central repository. Importantly it makes easier to collaborate across departments. Any changes that are made therefore do not cause any confusion & versions are easy to track.

2. Secure Access

Often, besides your internal team, you may also need to offer access to BOM to suppliers. BOM Management allows you to offer secure access. Additionally, you are also able to offer access to any changed suppliers or any other additional parties. All this significantly reduces time lags & ensures a seamless production.

3. Accountability

With a BOM Management solution you can also identify the revisions & edits & the people responsible for them. This ensures that accountability is maintained.

4. Proactive Assessments on BOM Components

These days it is imperative to source products that are environmentally compliant. It is therefore equally important to provide this compliance information to the right people in the supply chain. This ensures that quality is maintained, delays avoided and costs kept under check. With BOM Management it is easy to streamline this process.

5. Improves Collaboration

What the BOM Management process also allows you to do is to leverage informal communication methods. With the ability to provide inputs it enhances product development as it makes collaboration easy for the teams while enhancing traceability & team continuity.

6. Improves Product Lifecycle Management

BOM also aids in product lifecycle management in the following ways:

  • It becomes a single repository for all information.
  • It records all changes & revisions & lends itself to traceability.
  • Offers ease of assessment of cost.
  • Ensures seamless data handover.
  • It connects the design as well as purchase processes.

7. Accelerates Product Launches

When it comes to new product launches, speed is of the essence. In effect what a robust BOM enables you to do is to eliminate any manufacturing or PCB fabrication errors that stem from use of wrong parts, as well as stem any quality issues. With mechanical, software & electrical designs coming together for all product teams, new product development is significantly enhanced. In fact, engineering change review timelines can be severely cut. With collaboration improved between supply chain partners, errors are also significantly reduced.

It also ensures that disconnected silos do not exist as also brings about real collaboration between distributed teams. All this together results in quick time-to-market, a source of significant competitive advantage.

With automated BOM systems, you can, therefore, not just maintain optimal stocks, utilize real time data, integrate inputs from all departments, and more.

With the help of Mer-mar electronics, you can get quick time-to-market PCB assembly production and other competitive advantages you cannot get enough of. Submit your BOM file now to get a quick PCB quote.

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What Are Factors That Affect the PCB Assembly Cost?

By Mer-Mar Electronics | Date posted: | Last updated: January 12, 2023
factors that affect the PCB assembly cost

There are a wide variety of factors that affect the PCB Assembly cost. Here is an overview of the factors as well as some handy tips to keep the costs under check:

You can also check: Reduce Cost Through DFMA.

Factors That Affect the PCB Assembly Cost

#1. Material That Used in PCB

The material used for the board has a large implication on its costs. Commonly used materials include:

  • FR4
  • Polyimide
  • PTFE
  • Metal, to name a few

While different PCB materials come at different price points, however it is important to remember that cost cannot be the sole determinant in making the choice of board as that depends on a wide variety of factors including the environment in which the PCB needs to operate.

#2. The Number of Layers

Typically the more the number of layers you need to assemble, the higher the cost.

#3. Assembly Technology

Broadly Surface Mount Technology costs lower than Through-hole technology. Additionally, some PCBs may also require to use ball grid arrays or BGA assembly which impacts the assembly costs.

#4. Labor Costs for PCB Assembly

Labor costs have a bearing on the overall PCB cost. These costs can vary by region and thus impact the final cost. However, once again it is important to remember that you should not compromise expertise at the altar of costs.

#5. Order Volume

The order quantity is typically inversely proportional to the costs. High volume PCB would largely mean lower costs while if you have a requirement for a small quantity, the costs are likely to be higher.

#6. Customization

It stands to reason that the higher the degree of customization required by you, the higher the costs. Customization could take the form of- number of layers, the coating required or the trace size, and more. Also if your requirement is for standard shapes you will tend to pay a lower price than a specific, irregular shape. Sometimes your requirements could also include waterproofing that have a bearing on the costs.

#7. Time Lines

Should you need express deliveries, you will need to contend with higher costs. This is because the assemblers will need to put extra resources behind your order, which will come at an additional cost. Also, you will need to opt for expedited shipping as opposed to regular shipping which will further increase the cost.

#8. Packaging Cost

Some components such as BGA might need special packaging, which in turn impacts the overall costs. Also the kind of testing required also has an implication on the costs. For example, the electrical pins of the BGA need X-Ray inspection to check for issues such as short circuit.

Tips to Save PCB Assembly Costs

What then are some ways to optimize costs? Here are some handy tips:

1. Optimize PCB Design

It is important that as far as possible, you optimize the PCB design. This could be in terms of shape of the board, the surface finish required, the number of layers, via technology being used & more.

2. BOM

Ensuring that you provide a comprehensive BOM that includes all the details related to the components, assemblies & sub assemblies, is crucial. A comprehensive BOM should contain details such as:

  • Name of manufacturer
  • Part Number
  • Reference Designator
  • Quantity
  • Component replacements & more

YOU MAY ALSO LIKE: What Is BOM in PCB

Comprehensive details available at one go will not only enable the assembler to deliver the PCB as per specifications, it will also ensure there is no delay & the costs are optimal.

3. Ensure You Go with a Trusted Assembler

An experienced assembler can go a long way in helping you reduce costs without compromising on quality. Remember therefore to check on their capabilities, certification, relationship with suppliers, as these will ensure both quality & optimal prices.

4. Order Volume and Lead Time

As far as possible ensure you place a consolidated order as opposed o placing orders in small batches as the volumes will bring economies of scale & lower your cost. Additionally plan your project in such a way that the timelines aren’t excessively rushed as they will also impact your costs.

Keeping these seemingly small aspects in mind can go a long way in optimizing your overall PCB Assembly costs & ensuring that your project is highly competitive.

Factors related to PCB assembly cost
PCB Assembly Cost

Top 6 PCB assembly myths you must know to meet high-quality standards!

By Mer-Mar Electronics | Date posted: | Last updated: September 26, 2022
PCB Assembly myths

Knowledge, as they say, is power. However, this knowledge must be well-founded. There are several myths that also do the rounds, and which are followed without attention can lead to devastating consequences. When these myths have to do with PCB Assembly, one must be quite careful. A well-assembled PCB can make or break your product. Let us look at the top 6 PCB Assembly myths as also debunk them!

PCB Assembly Myths

If these myths are not debunked there is a big chance of costly PCB fabrication errors, production of defective boards & more. So here goes:

#1 Myth: It is all right to place components anywhere on the board

The fact, however, is that components such as resistors, LEDs, transistors, diodes, inductors, capacitors need to be placed at specific locations as per the requisite specifications. Failure to follow these specifications can lead to a whole lot of issues on the board, compromising its functionality.

#2 Myth: Via in pad can damage assembly

Many manufacturers believe in this myth & do not use via in pads on their boards. In doing this they miss several advantages that via in pads offer, namely that they reduce inductance, increase density, and employ finer pitch array packages. It is however important that via in pads are assembled correctly. For example, you need to ensure that plating chemicals do not get trapped while making via in pads. An experienced contract manufacturer will be able to ensure that he is able to reap the advantages offered by via in pads.

#3 Myth: Both prototypes & actual production runs follow the same layout

The fact is that typically for a prototype a through-hole manufacturing process is preferred as quantities are limited and the soldering process easy. When it comes to the actual production, often surface-mount technology is used since it offers a wide range of advantages including but not limited to:

  • Improved flexibility, reliability & performance.
  • Improved component density that works well with miniaturization.
  • It lends itself to the creation of smaller & lighter boards.
  • Takes away the need of drilling of holes.
  • It lends itself to automation.
  • Offers ease of assembly.

#4. Myth: Trace widths cannot be less than 3 mils

While this may have been a fact in the early days of PCB manufacturing, it is not true anymore. With advancements in PCB Assembly, it is entirely possible to go with trace widths smaller than 3 mils.

#5. Myth: The right current delivery is not crucial

The fact however is that to ensure the performance of the board, right current delivery is extremely crucial. Some parts require more power than others & this aspect needs to be considered during the early assembly stages.

#6. Myth: A beautiful design is everything

A beautiful design can have PCB designers quite excited. After all, if you can have any track width, spacing and more, it does offer you a certain freedom. The fact, however, remains that the design needs to consider a host of real-world limitations, especially those to do with PCB Assembly. The design must lend itself to ease of assembly as otherwise it can lead to real world issues that can have an implication for functionality as well as for the cost.

To sum up

While it is important to be aware of the facts to do with PCB assembly so that proper quality standards can be maintained, it is equally important to go with a PCB assembly partner who is equipped with industry best practices and who does not need to waste a lot of time for no reason.

It is best to go with a partner who can not only help you with your prototype but who is also well-equipped to handle high-volume runs. Mer-Mar Electronics also provides high-volume PCB assembly and other PCB services like PCB fabrication, PCB designing, and prototyping services. Just fill out the form to get a quick PCB quote now.

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Top things you should consider while preparing wire harness assembly design!

By Mer-Mar Electronics | Date posted: | Last updated: August 6, 2022
Wire harness design

Wire harnesses refer to wires that are bundled together to suit specific applications. They come in a wide range of complexities from individual wires to a complex harness that comprises of hundreds of individual wires. The good thing about wire harnesses is that they can be highly customized to transmit power as well as data. Additionally in terms of location they can conform to a wide variety of space constraints. Some of the aspects that need to be considered when it comes to wire harness design so that it functions safely and as per specifications include:

  • Environmental considerations
  • Power Demand
  • Lengths

Taking these details into account at the design stage means that costly errors can be avoided later & that the results are more effective. Let us look at some of the aspects that you need to consider while manufacturing a wire harness.

Wire harness design: Things to keep in mind

Environmental considerations

It is imperative to consider the demands of the environment in which the harness must function. Some of the environmental hazards that cable harness assembly must face include:

  • Extremes of temperature
  • Exposure to water
  • Exposure to chemicals
  • Exposure to vibration leading to abrasion

It is important, therefore, to choose the right wire depending on the environmental factors. The wrong choice of wire can lead to issues including but not limited to breakdown of insulation, safety issues, compliance failures, costly accidents, and more.

Parts Considerations

It is extremely important that when you share the list of parts with a contract manufacturer, you make sure that the partner can cross reference these parts to a manufacturer. In case your requirements do not pertain to a specific manufacturer or brand, a mention of “or equivalent” can go a long way for the contract manufacturer to be able to substitute the parts in a way it optimizes quality as well as costs.

In case there are internal specifications for production, you need to make sure that the same is shared with the partner so that the harness meets your bespoke specifications.

1. Lengths and Tolerances

You need to know the exact dimensions as well as the acceptable tolerances for the lengths.

2. Covering

Some of the covers available include:

  • Braided Loom
  • Split Sleeve
  • Conduit
  • Tape

Each of them has their own distinct set of advantages. Understanding them in detail will ensure that you are able to determine which one will work best for your bespoke application. In choosing the covering (or not), ensure that you keep the following aspects in mind:

  • Flexibility
  • Serviceability
  • Troubleshooting, and more.

3. Splicing and splice locations

Do remember to review the kind of splicing you need before you reach out to the wire harness manufacturer.

4. Wire color and labeling

To help identify circuit names, wire colors as well as any text that you want printed is to be determined early.

5. Type

Ensure that you choose the type of wire with care. Wire that is used for automotives, for example, is quite different from those used in electrical control panels. Some of the aspects to keep in mind include:

  • Voltage Ratings
  • Insulation Material
  • Bare or plated copper, and more.

6. Terminals, seals, and connectors

There are a wide variety of terminals in wire harness, seals as well as connectors. In fact, connectors cater to several types of terminals and seals. Additionally, some connectors require additional accessories. It is important therefore to identify such accessories in advance.

7. Labeling

In case you need certain connectors to be labeled, it is imperative that a note be placed on your drawing that informs the contract manufacturer of your requirements.

8. Testing

Depending on your bespoke requirements & where the harness needs to be used, you may have specific testing requirements. In some cases, a continuity test may be in order while in others a high voltage test may be imperative.

Work closely with the PCB contract manufacturer

It is important to recognize that a drawing can seldom be perfect. There could be occasions where in your bid to offer too many details on the drawings you have rendered it extremely cluttered. On the other hand, in a bid to avoid clutter, you could end up giving information that is too unsure for the contract manufacturer. It is therefore advisable to work closely with the contract manufacturer to ensure that you give the right level of details as well as choose a convenient way to handle any deviations and/or revisions.

Choice of the right PCB contract manufacturer can go a long way in ensuring that the process is streamlined & your wire harness is created to meet your exact specifications.

When it comes to the right PCB manufacturer you can consider Mer-Mar Electronics which provides cable harnessing assembly service without any hassle. We specialize in assembling simple wire cable harness assemblies through to complex custom-build cable and wire harnesses using combinations of single-core or multicore cables.

Get a quote to know more details.

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