10 Common Reasons Why Hardware Projects Fail

1. Vague or Incomplete Product Requirements Document

A product requirements document (or technical specification) can be considered as incomplete or vague if it has:

• no glossary of terms;
• vague phrasing;
• mixed up functional and non-functional requirements;
• no use cases;
• no explicitly described product's intended purpose;
• no description of who the end user of the system will be.

Clients don't always know how to write a thorough technical specification. When a project kicks off, our team interviews the customer to gather device requirements. We described this procedure in another article. Then, based on their answers, we draft the technical specification. Interviews also help to find out what matters to the client aside from functional requirements (size, design, etc.)

So, what can happen if the team deals with a vague technical specification?

1) Misunderstandings between the client and engineers 

No clear requirements list is like no common language between the customer and the team. The client often describes the task at the business logic level, but engineers need physical parameters such as response time, power usage, and bandwidth.

If the requirements list lacks specific, measurable parameters, each party will fill in the blanks themselves. This often leads to misunderstandings. The client argues that the team didn’t do something. The developers say it wasn't in the spec. The customer says it was implied. The truth is if something isn’t in the specification, developers assume by default that there is no budget for this. As a result, you have to squeeze new tasks into the plan and revise the timeline, which often demotivates the team and irritates the customer.

2) Incorrect project estimate

Based on the requirements listed in the technical specification, the developer estimates project cost and duration. The more accurate the specification, the more accurate the figures. But what if the requirements are vague or incomplete? 

Option 1: The team bakes massive risks into the budget, causing the project cost to bloat significantly. 

Option 2: The team gives an overly optimistic estimate but then has to revise the deadlines and budgets in the middle of the project. Moreover, if the parties agree on a Fixed Price model (see our post on payment models for hardware projects), the team will find themselves working at a loss at some point. This will affect the project quality since the team will try to minimize the damage to themselves. 

3) No project acceptance criteria

The technical specification defines the exact criteria for a project's success. It excludes misinterpretation and protects both sides: the client can verify their requirements are met, and the developer knows precisely what to build. For example, if the document states “latency must not exceed 10 ms” and the actual latency is 8 ms, there is no ground for complaint.

For more details on how to write a proper technical specification, read this article.

Important note! Some projects do not adhere to a strict technical specification. They involve a heavy share of R&D and experimentation. In such cases, it’s OK to have certain gaps and ambiguity in the requirements. But project success is not guaranteed either.

2. Underestimating Real-World Operating Conditions and Certification

One common example of a vague technical specification is failure to define the device's operating environment. These requirements may include:

• operating temperature range;
• ingress protection (dust and moisture resistance);
• vibration tolerance;
• electromagnetic compatibility (EMC);
• electrostatic discharge (ESD) protection.

The team must know where and how the system will be used before the project kicks off. Otherwise, the product might fry during the very first field tests, forcing the client to make costly design changes and build a brand-new prototype.

Device certification is another factor to watch out for. Imagine the client originally wants a device just for their internal use and with no intention to sell. To save time and money, the team designs the device with no account of electromagnetic compatibility requirements. But at the end of the project, the client changes their mind and decides to bring the device to market. Formally the device works, but it fails EMC testing. The client can’t legally sell it.

Sometimes, to fix the issue, you will only need to solder a couple of components. But sometimes it requires a much deeper PCB redesign, which might also mean changing the enclosure. This bloats the budget and pushes the product launch back by months.

For more details, read our article on electronics certification.

3. Scope Creep Due to Poor Planning

Even with high-quality project preparation, there might be something you can miss. Making occasional design changes is a standard practice. However, if the changes are significant, the work will inevitably push past the original deadlines.

When it comes to software, developers have a larger “safety margin.” Even adding a relatively major feature might only require a few dozen extra hours of work. As long as these fixes don't break the rest of the codebase, it’s not critical for the project. In PCB design, however, implementing even one minor feature can cost as much as half the project.

For example, it may turn out midway through the project that you need to add another temperature sensor to the PCB. It sounds like no big deal: just mounting a single cheap component. But in reality, this might require re-routing the entire board. You have to find space, route the power and signal lines, and maintain proper clearances to minimize interference. If you are low on space, you'll have to increase the layer count or the board size, which drives up manufacturing costs. Additionally, you might run out of free microcontroller GPIO pins. So, you’ll have to either add port expanders—which complicates the schematic again—or swap the MCU for a more powerful one. Swapping the MCU at a late stage is another big issue.

This creates a domino effect, and you have to pay for every falling piece. On top of that, any such change requires manufacturing a new PCB revision. That means extra money—not much compared to the total project cost, but if you have to make a new prototype every month, you will run out of budget very quickly.

Sometimes these changes are requested by the client. In that case, the team must notify them that doing so will change the schedule, budget, and deliverables. Sometimes scope creep happens when the team miscalculates the project estimate. Then, there's nothing else to do but to complete that part of the project on the contractor’s own dime.

Of course, not every change triggers this kind of avalanche. But to avoid the risk, it's best to lock down the device's feature set at the start and try to hold off on major adjustments during the project.

4. Ignoring Component Lifecycles and Supply Chain Risks

A commercial device will eventually be manufactured in a factory and shipped to retail stores or industrial enterprises. Making a mistake when selecting components or their vendors during development may cause production issues later.

Typical mistakes include:

• Selecting components whose lifecycle is coming to an end

Let's say a component in the catalog fits the project perfectly. However, its status says “Not Recommended for New Designs,” meaning it will soon be discontinued. Yes, it's frustrating, but you will have to find an alternative, unless your team is designing a one-off product rather than something for the mass market.

• Relying on single-source vendors

The developer team shouldn't depend on unique components manufactured by the only factory in the world. If that factory suffers a fire, a flood, or a strike, your production line will come to a dead stop.

Therefore, you should always look for components that have alternatives during the design stage. This approach ensures you can quickly adapt the PCB for another manufacturer if needed.

5. Refusing to Show Intermediate Results

Sometimes clients forget details from the tech specs and developers miss things during planning. We are all human; it happens. But without regular check-ins, the final product drifts away from what the client actually wants.

This is why it is vital to share intermediate milestones—mockups, early prototypes, new features, app screen designs, and so on. Some developers prefer to operate in a “black box” and unveil the results only when they have a fully completed product. But by this time, the customer’s vision and yours might get miles apart.

The later you discover a misalignment in product vision, the more expensive it is to fix. As a result, the project is much more likely to fail.

Additionally, there is a legal nuance here. By accepting intermediate results, the client confirms they are satisfied with the features implemented so far. This prevents them from changing their mind later when the project is in its final stages.

6. Lack of Coordination Between Different Teams

Electronics development involves tight, rigid interdependences: software depends on the hardware, the hardware depends on the enclosure, and the enclosure depends on physics, operating conditions, and ergonomics. Without close coordination across these chain links, the project devolves into a series of endless redesigns. For instance, the lack of communication between an industrial designer and a PCB design engineer will result in a PCB that doesn’t fit the enclosure. 

Misunderstandings happen even within a single company. We previously shared this case: while working on a project, our hardware and software teams both implemented encryption on their respective sides. Later, we discovered that the software team had used a high-level library and encrypted only the payload data, while the hardware team used a low-level library and encrypted the technical data as well.

7. Poor Testing Practices

If the first prototype powers up and performs its basic functions, it doesn’t mean the device will run reliably for thousands of end users in real-world operating conditions. This is why the first iteration must go through rigorous, multi-level testing—not just final acceptance testing, but testing at every single stage of development.

Teams often neglect testing because of tight deadlines or because the client wants to cut costs on work they believe to be useless. But in hardware, the cost of an undetected bug grows exponentially with each stage: from a quick schematic fix at the beginning of the project to a full-blown product recall from store shelves after it's finished. This makes it absolutely critical to stand your ground and defend this stage of development.

Typical testing methods in embedded electronics development include:

• circuit and component simulations;
• functional testing;
• hardware-in-the-loop (HIL) testing, where the firmware runs on the actual microcontroller while external signals are simulated;
• field testing under real-world operating conditions;
• static code analysis;
• unit tests, and more.

8. Poor Documentation Practices

Maintaining documentation is the direct responsibility of a contract electronics developer. If the technical specification doesn't explicitly define the scope and formatting standards, the contractor will do only the bare minimum—especially if deadlines are tight. Typically, it’s not a problem. But if the client decides to switch development teams for any reason, they may find themselves with a “black box” on their hands. The same thing can happen to the development team itself if a key engineer leaves in the middle of a project. At that point, the work turns into a reverse-engineering project.

Depending on the project scope, the team prepares and hands the following documents over to the client:

• system block diagrams;
• circuit diagrams;
• Bill of Materials (BOM);
• PCB layout files;
• 3D models of the PCB;
• assembly drawings;
• source code for embedded (firmware) and application software;
• development environment deployment instructions;
• device functional logic descriptions;
• production/manufacturing test procedures;
• firmware update instructions, and more.

9. Delaying Time-to-Market

Product owners like to add as many cool features to their product as possible. Wi-Fi, ambient light sensors, voice control, wireless charging—it seems like the users will love them all. But in today’s world, Time-to-Market is everything. The more features you implement, the longer it takes to develop the first version of the device, and the more expensive the product becomes. This creates at least two major problems.

First, there is a high risk of miscalculating your core hypothesis. The developers and the client might think that a certain feature is a must-have. But when the product launches, it may turn out users don't care about it and actually want something else. So, valuable time and budget end up wasted.

This is why it’s important to enter the market early and work in lockstep with the marketing department. From Integra Sources’ experience, companies get real validation when they go to trade shows to demonstrate even a rough MVP. This allows them to gauge market interest, uncover actual user needs, attract investors, and even kickstart pre-sales.

Second, while the team is busy perfecting their device, competitors might finish a simple MVP, capture the niche, collect pre-orders, and build a loyal customer base. Speed frequently beats perfection.

So, sometimes it's better to keep questionable features for later and launch an MVP or MSP (Minimum Sellable Product) as quickly as possible. This lets you gather feedback from end users, secure pre-orders and funding, and start building brand awareness.

10. Hoping to Make Your Product Cheaper

The argument seems obvious: if a competitor's device retails for $100 and the BOM cost is only $15, you can design your own gadget, price it at $50, and capture the market. However, a low production cost doesn’t guarantee commercial success. Sure, if you are competing against a startup that just released the first version of its product, making your device cheaper is doable. But you'll be playing catch-up. And in most cases, competing on price with established manufacturers is outright impossible.

• Economies of Scale

If you are competing against a more mature company, your chances of success are relatively slim. After all, they are working to drive down costs too. Moreover, if a competitor makes 50,000 devices a year, component manufacturers sell them microcontrollers, sensors, and displays at a massive volume discount. If you only order a batch of 1,000 units, your per-unit cost will be significantly higher.

• Fighting Established Brands

There are exceptions. For example, a competitor might charge a premium simply because of their brand name. In that case, you can make it cheaper, but you will have to compete against an established brand that has already proven itself in the market. Consequently, the money you saved on R&D will likely end up going into marketing. End users are hesitant to buy no-name electronics even if they are cheaper. A brand represents trust, warranties, support, and predictability. To overcome that skepticism and convince someone to buy your device, you’ll need a massive advertising budget.

• Hidden Costs and Regulatory Compliance

Furthermore, certain industries operate as “exclusive membership clubs” with their own standards and rules mandated by law. This includes healthcare, aviation, automotive industry, explosion-proof equipment, industrial machinery, and more.

To simply gain the right to sell your device, you must pass industry-specific certifications, purchase licenses to use certain patents or communication protocols, and implement a quality management system at the manufacturing facility. In the end, you might manage to build a device for five bucks, but the entry cost will drive the unit price right back up to match the competition.

Conclusion

Developing an electronic device is always a balancing act between perfect engineering design and harsh commercial reality. Remember that you are not just building an efficient gadget; you are creating a product. It needs to operate in real-world (and sometimes extreme) conditions, generate revenue for your client, and solve a specific user pain point.

Most fatal mistakes can be avoided at the project launch. Don't be afraid to ask the customer as many questions as you need during the tech spec stage. Always demonstrate intermediate results and insist on thorough testing. And of course maintain a realistic view of the market.