Custom Software vs Off-the-Shelf ERP: A Comparison

When software comes up at a manufacturing company in Bursa, you usually hear one of two sentences. One is "Everyone uses Logo, let's buy it, get it installed and be done." The other is "Our work is different, no package fits us, let's have our own program built." There are situations where each is right, and situations where each turns out to be expensive.

In this article we look at the difference between off-the-shelf ERP software and custom software, when each one makes sense, and the hybrid path that is the most realistic option for most factories. As a software company, saying "let's build everything custom" might suit us; but in this article we have also spelled out the situations where an off-the-shelf package is the right choice. The goal is for you to make the decision that fits your factory.

Off-the-shelf package and custom software: What are we comparing?#

An off-the-shelf ERP is a licensed product developed around the common needs of many companies. It has modules such as accounting, invoicing, inventory, purchasing, sales and human resources. In Turkey, products such as Logo, Mikro and Netsis fall into this group. Its strength is that it has been proven at thousands of companies, and that regulatory changes (e-invoicing, e-ledger, tax rules) are tracked by the vendor.

Custom software is a system designed from scratch, or largely tailored, around your processes. Production tracking software, an MRP software module, a warehouse management system (WMS), maintenance management or cost calculation are built around how the factory actually works. Its strength is that it fits the process exactly and stays under your control without license fees to anyone.

These two approaches are often discussed as rivals; on the shop floor, though, they usually work together. Let's look at the differences first.

Comparison table#

One point to keep in mind when reading the table: "cheaper" or "faster" mean little on their own. The answer on the same row will differ for a five-user workshop and a three-shift factory with hundreds of recipes.

When an off-the-shelf package is the right choice#

To be honest, an off-the-shelf package is the right starting point for many companies. A packaged ERP is usually the more sensible choice when:

• Your needs are mainly accounting, invoicing, inventory and customer accounts. These areas look similar at every company, and packages have been doing this work for years.
• Regulatory compliance is critical. E-invoicing, e-archive, e-ledger and tax rules change often. Keeping all of this current in your own software is a serious burden.
• Your processes are close to the industry standard. If the workflow the package suggests already fits your business, rewriting it brings little return.
• Nobody in-house will own the software. Custom software is not something you write once and walk away from; someone needs to keep track of needs.
• You need to get started quickly. For a newly founded company it is healthier to first get the core records in order and let specific needs become clear over time.

If most of these apply to you, investing in choosing a good package and implementing it properly is smarter than spending money on custom software.

When custom software stands out#

On the other hand, in some factories the feeling that "our work doesn't fit these screens" never goes away, however good the package is. Custom software usually makes sense when:

• Your production process is non-standard. Multi-stage subcontracted operations, part-level traceability, customer-specific recipes or machine-level capacity planning are either missing from packages or handled with forced workarounds.
• Excel has replaced the package. If production planning, cost calculation or warehouse layout still live in Excel even though an ERP is installed, the package isn't covering the core work.
• You need to collect data from the shop floor. Processing data from machines, terminals, barcodes or a quality control station in real time usually requires custom development.
• You have many users but light usage. If every operator on the floor only needs a few screens, a per-user license model can inflate costs unnecessarily.
• Your competitive advantage is in your process. If what sets you apart from competitors is a way of working, forcing it into the mold of a package everyone uses can weaken that advantage.

The realistic path for most factories: A hybrid approach#

When we talk to manufacturing companies in Bursa, the picture we see most often is this: on the accounting and finance side there is a package such as Logo, Mikro or Netsis that has been in use for years and works well. The problems are in production, maintenance, the warehouse and cost calculation.

In that situation, throwing everything away and writing an ERP from scratch is unnecessary risk, and so is over-customizing and forcing the package. In a hybrid approach:

1. The existing package stays as the core. Accounting, invoicing, customer accounts and compliance keep running in the system you know.
2. Missing modules are filled in with custom software. Areas where the package is weak, such as production tracking software, maintenance management, cost calculation or a warehouse management system, are built around your factory.
3. The two are integrated. Stock movements, work orders, shipments and cost data flow automatically between the two systems. Entering the same data in two places by hand goes away.

The most important benefit of this approach is that it splits the risk. Each module can go live separately, the team gets used to the new system step by step, and if one module doesn't deliver the expected result, the rest of the setup isn't disrupted. Specific needs such as quoting or quality control can be added next to the core in the same way. For example, systems such as pricing and quotation automation or the CSL2 quality control station can be set up to talk to your existing ERP without replacing it.

What drives cost?#

Whichever path you choose, the factors that drive cost are similar. Knowing them is more useful than a number, because they show what to question when you collect quotes:

• Scope: How many modules, processes and roles? A price given before the scope is clear will change later.
• Number of integrations: The existing ERP, machines, barcode system, e-commerce or supplier portals. Each connection is a separate work item.
• Data migration: How clean are the stock cards, recipes and customer records in the old system? Cleaning up scattered data often takes longer than expected.
• Number of users and license model: On the package side, per-user and per-module fees can become a significant part of the total cost over the years.
• Depth of customization: Every customization made to a package is something that has to be revisited with later version upgrades.
• Training and change management: The time set aside for the shop floor team to adopt the system matters as much as the software itself.
• Maintenance and development: The budget for post-launch support, bug fixes and new needs should be planned from the start.

Questions to ask before you decide#

These are some of the questions we ask companies in first meetings during software consulting. Discussing them with your own team goes a long way toward clarifying the decision:

• Which process costs us the most time and causes the most errors today?
• Are there modules in our current ERP that we pay for but don't use?
• Which work outside the ERP runs in Excel, on paper or in people's heads?
• Who will take responsibility for regulation-driven work (e-invoicing, e-ledger)?
• Is there someone in-house who will own the system and keep track of needs?
• What production data do we want to see in real time, and where does that data come from today?
• How will our number of users and our processes have changed in five years?
• Who will hold the source code, the data structure and the documentation?

Common mistakes#

Trying to rewrite everything from scratch#

Dropping a package that handles accounting and compliance well and having the entire ERP rewritten from scratch is often the longest and riskiest path. Rewriting the accounting module adds a heavy burden without giving the factory any new capability. Custom software should be used where it makes a difference.

Over-customizing the package#

Dozens of custom reports, screens and triggers built to make a package fit the factory can, over time, turn the system into something nobody fully understands. Each of those customizations has to be retested with every version upgrade. Past a certain point, building a separate module next to the package is a cleaner solution than forcing it.

Underestimating data migration#

The success of a new system depends on the quality of the data loaded into it. When duplicate stock cards, incomplete recipes and inconsistent units are carried into the new system, the problems come with them. Data cleanup and a migration plan should be treated as a separate piece of work at the start of the project.

Leaving users out of the process#

If the operators, warehouse staff and planners who will use the software every day aren't heard during design, even the best system will eventually lose out to the Excel file kept on the side.

Let's find the path that fits your factory#

At MountainTech+, our team in Nilüfer has been building software and AI solutions for businesses in Bursa and the surrounding region since 2021. Our recommendation is never simply "let us build everything"; first we look on site, together with you, at what your current system does well and where it gets stuck. If an off-the-shelf package is enough, we'll tell you so; if something is missing, we'll suggest filling in only that gap. To talk about which path is right for your factory, request a free discovery call on our contact page, or explore our other solutions on the services page.

Frequently Asked Questions#

Is custom software always more expensive than an off-the-shelf package?#

The upfront cost is usually higher, but the total cost of ownership depends on the number of users, the license model, customization needs and the maintenance load over the years. The right comparison is not the first year's invoice but the total cost over several years.

Do we have to give up our existing Logo, Mikro or Netsis system?#

In most cases, no. A package that works well for accounting and compliance can stay as the core; areas where it falls short, such as production tracking, maintenance management, cost calculation or warehouse management, can be filled in with custom software and integrated with the existing system.

Are production tracking software and MRP software the same thing?#

Not exactly. MRP software calculates which materials are needed, when and in what quantity, based on the production plan. Production tracking software monitors how work orders progress on the shop floor, how long they take on which machine and how much scrap is produced. In many factories the two are set up together so that each feeds the other.

Will we be locked in to the developer with custom software?#

This risk can largely be managed by contract. Having the source code, the data structure and the technical documentation handed over to you means another team can take over the system as well. We recommend asking about this openly during the first conversations.

What do we discuss in the free discovery call?#

We talk about your current software, the processes where you lose the most time and your goals. At the end of the call we share an honest assessment of whether an off-the-shelf package, custom software or a combination of the two makes sense. The call involves no commitment.