Revamp your website and mobile app

Supercharge Your Website and Mobile App Experience: Get a Complimentary UI/UX Audit in 48 Hours!

Supercharge Your Website and Mobile App Experience: Get a Complimentary UI/UX Audit in 48 Hours!​

Navigating Legacy System Modernization: A Step-by-Step Migration

Master the art of legacy system modernization with our in-depth guide to overcoming challenges and improving your business ROI with legacy application modernization.
Navigating Legacy System Modernization_ A Step-by-Step Migration

“The old ways won’t open new doors.”

But modernizing old can open new doors for not only business but for opportunities as well. This is the case with legacy systems or outdated systems. Legacy systems (old ways) need a modernization touch (new doors), and legacy system modernization is the prime answer to the need. 

Businesses must make critical choices when starting a legacy system modernization project, such as whether to enhance current software, replace obsolete systems, or reorganize programs that impede corporate goals. This approach helps organizations to overcome obstacles, embrace innovation, and maintain their competitiveness. It is not merely technological.

In this blog, we’ll explore some critical queries about modernizing legacy applications. We will examine the advantages of the same as well as make you understand how legacy system modernization can double your business ROI, which can provide companies with a competitive edge in today’s fast-paced market.

This blog will provide you with the information and resources you need, whether you are a company leader looking for ideas for sustainable growth or a CIO determining the future of your organization’s digital landscape.

What is Legacy System Modernization?

Any outdated system that is still in for day-to-day use. Quoting Gartner’s words, “An information system that may be based on outdated technologies but is critical to day-to-day operations.”

A very relatable example of the legacy system is “Windows XP” or, for that matter, “previous Windows versions.” These versions now do not have the updated features, and neither do they have upgraded security features. The company has even stopped releasing support for them.

Why Do You Need Legacy System Modernization?

Why do we feel the need to be updated? What is the reason that when the latest information and the latest system updates arrive on the market, we are in a hurry to implement them?

Staying relevant and competitive in today’s era is not a ritual it is a necessity.

And above all, the fear of becoming obsolete. As soon as you are less competent, you become replaceable. When you come across these characteristics very often, it is time to get updated.

Modernizing the legacy system means updating the system with updated features and, if possible, upgrading the software platform and architecture.

Again, going by the Microsoft Windows example, remember that whenever a new operating system is launched, the company provides the latest version for its customers. When you opt for the higher version, your system is upgraded. You do not have to throw the system away to get an updated version of the software.

Similarly, with legacy system modernization, your old system gets upgraded and modernized to give you the best output. In addition to addressing the shortcomings of old technologies, this transformative process makes sure that it is in line with security guidelines, industry standards, and changing business needs. Organizations can improve overall performance, scalability, and operational efficiency by updating their aging systems. By doing this, they further strengthen their position for long-term success in the ever-changing digital market.

Which Are the Most Common Application Modernization Problems?

When you do not update the system, it becomes

  • Slower and Sluggish – Due to a lack of hardware support, the system becomes slower.
  • Vulnerable and Increased security threats – Without the latest security patches and upgrades, the system is vulnerable to the latest security threats.
  • Less competent – Without the latest updates, the system becomes less relevant and hence less competent.
  • System crashes – In the absence of updates, there might be frequent system crashes.
  • Inability to integrate modern technologies – There will not be enough support from the system for the latest tech integration.
  • Data Silos – Without technological integration, there exist data silos, i.e., isolation of information. Data is isolated and cannot be accessed by other departments or systems.
  • Increased maintenance costs – The outdated system with limited support needs more fuel to sustain. A survey found that around 80% of the IT budget is used to keep legacy systems afloat.

Benefits of Bespoke Software Development Application Modernization Services

It is very well understood from the needs of legacy system modernization that an outdated system has many lacunas and, if not treated at the right time, can turn into significant issues causing damage to the project or maybe to the organization. In the above section, we have discussed the problems; let us look at the benefits of bespoke software development application modernization services –

  • Improved Performance and Efficiency –With legacy application modernization, the system’s performance is positively impacted. The improved efficiency helps create quick responses and enhances the user experience. Scalability becomes more feasible.
  • Improved Security – Application modernization solutions effectively improve security with the latest security patches. Making the system more secure and robust.
  • Improved Speed – Upgraded legacy applications modernization leads to better hardware support. This helps in boosting the system speed.
  • Improved Competency – Modernization makes the system updated. An updated system is more relevant to contemporary trends making it more competent.
  • Cost Saving – When legacy system modernization is adopted, it not only upgrades the systems but also saves the spiraling maintenance costs. Modernization streamlines the process and saves costs.

IT Transformation Reduces Cost of Future Change

Image Source

Challenges While Migrating Legacy Systems

In the above section, we understood the benefits of legacy system modernization, but migrating to the latest technology from legacy systems is a daunting job. Replacing legacy applications and systems with new and different technologies is not only a challenging but tedious task. A few of the challenges legacy system modernization faces are:

Challenges While Migrating Legacy Systems

  1. Technical Debt and Data Loss

    Technical debt is one of the drawbacks of modernizing legacy systems. Simply put, it is the shortcut taken by a developer to resolve a problem requiring a detailed, well-thought-out approach.

    Technical debt frequently makes modernizing legacy apps a problematic task. In software development, “technical debt” is a metaphor for the results of selecting a fast fix for an issue over a more thorough and responsible course of action.

    Technical debt arises from unintentional choices made by software development teams or individuals who sacrifice the code quality or take shortcuts in order to satisfy short-term development deadlines or goals. This is frequently due to the fact that efficiently updating the system can take time. These shortcuts may lead to substandard coding or solutions that do not always deal with the underlying source of the problem. A few corrective measures can be –

    • Proactively reducing the tech debt
    • Transition to Cloud System or Cloud system modernization services
    • Adopting DevOps methodology
  2. Security and Compliance

    Modernization initiatives must prioritize security. Modernization offers a chance to update and strengthen security protocols. Integrate security early to guarantee the security of modernized apps. Application modernization services make security a fundamental part of the application’s architecture and design by incorporating it into the modernization process from the start.

    Perform a risk assessment: To find potential threats that might surface during modernization, perform a thorough security risk assessment.

    Specify the conditions and goals: Clearly state the updated application’s security expectations and needs. Data protection, access restrictions, encryption, and regulatory compliance are a few topics that this should address.

    Assure adherence: Finally, confirm that updated systems abide by applicable laws and that a routine procedure is in place to maintain compliance.

  3. Workflow Issues

    The end user and the process are frequently uncoordinated when a legacy system is redesigned and reengineered. One of the main problems with migrating historical programs is that users will have a challenging time understanding and utilizing the system. If this is not addressed—ideally through training—poor employee engagement may result.

  4. Reducing Downtime and Disruptions

    Whenever legacy systems are modified due to the process, there comes downtime when operations come to a halt. Business operations may be impacted by downtime during a move. We will look at techniques to reduce downtime, guarantee a smooth transfer, and lessen any workflow interruptions.

  5. Skill Gap

    Finding a developer who is skilled in legacy systems as well as modern technologies becomes a challenging task for organizations. One way to resolve this is upskilling the existing employees. Another is to hire employees who are skilled in the respective requirements.

  6. Data Silos

    Legacy software (age-old software) used by legacy systems makes it difficult for them to interact with more recent innovations.
    Data silos result from this lack of integration. It denotes that data is isolated and difficult to exchange or access between many departments or systems. These legacy difficulties impede efficient decision-making and data analysis. Furthermore, your company’s capacity to implement cutting-edge solutions like cloud computing or advanced analytics may be constrained by its incapacity to integrate with new technology.

Do you Want to Save Money While Speeding Up your Digital Transformation with Latest Technology

Adding Up the Cost of Legacy System Modernization

Businesses may still be utilizing legacy systems, which are outdated hardware or software. These technologies have some unforeseen expenses that could negatively impact an organization’s productivity and profitability, even though they may still be helpful. Here are a few unstated costs related to outdated systems:

Adding Up the Cost of Legacy System Modernization

  1. Maintenance Costs

    System and application management becomes a daunting task, especially with legacy systems. Every time any major update or modification incurs complexity. Resolving such complexities can cause bugs. This is again not desirable. A basic modification has the potential to cause a time and money investing problem. The ramifications may include more time from the experts to resolve any issue or to invest more money. Sometimes it can be both.

  2. Support Costs

    As systems age, vendors decline support for them. This results in hardships in managing the systems without vendor support. Vendors are more interested in new technologies that can earn them more money. Therefore, if you have been depending on outside software suppliers, it will be even harder to maintain the program operating in the event that they quit entirely offering support.

  3. Legacy Skill Sets Costs

    “How many of your developers can fix an issue with COBOL?”
    Legacy skill set needs experts who know the tech in and out to resolve any minor or major issue. If those with the knowledge of legacy systems retire, the talent pool shrinks. A legacy skill set is necessary for maintaining a legacy system. The market inclination towards more modern technology automatically worsens the situation. More so, the skill gap creates a challenge in the workflow.

  4. Agility Costs

    It is challenging to alter the majority of outdated systems. What occurs then if you need to implement a new application or feature for the company? Projects tend to go longer and over budget, here is what happens. Over the course of the endeavor, you keep running into obstacles. It takes time to test new features because it is hard to gauge how well everything works with the current system. The expenses of integration also usually increase with these developments.

How Can You Double ROI with Legacy System Modernization?

We have seen that App modernization has hidden costs which were discussed. But how can it be of advantage and help increase the ROI of your business? Let us see

One of the many commercial advantages of enterprise application modernization of outdated systems with new enterprise apps is a notable increase in return on investment. Through process simplification and workflow optimization, businesses can increase operational effectiveness, resulting in significant cost savings and improved customer experiences.

A McKinsey study states that companies that improve customer experiences usually see growth of 5 to 10 percent and cost reductions of 15 to 25 percent. Another significant benefit that businesses may get from updating their IT assets is improved cybersecurity.

The deliberate transition from outdated systems to flexible, customized solutions promotes innovation and scalability, generating significant returns on investment and setting up companies for long-term success in the digital age. Custom software solutions for legacy systems are another great option to opt for if you are dealing with an End-of-Life legacy system.

Different Approaches to Legacy System Modernization

Different Approaches to Legacy System Modernization Strategy

Depending on your organization’s unique goals and circumstances, there are several ways to modernize legacy applications. The existing state of the application, financial restrictions, and the intended result all play a role in the approach selection. Legacy application modernization services can take various approaches to enterprise application modernization. They can be –

  1. Rehosting

    Rehosting is the process of moving old applications to a new setting while keeping the majority of its functionality and code the same. When a speedy transition is necessary, it is a good option, although it might not fully utilize modernization. Knowing how source code is organized and arranged in a software program requires a comprehension of its code structure.

  2. Refactoring

    It is the process of reorganizing and streamlining current code to increase maintainability and performance without compromising its essential features. This tactic may work well to increase the productivity of an application.

  3. Replatforming

    Replatforming is the process of transferring legacy applications to an alternative infrastructure or platform. This requires some code change but can result in scalability and performance gains.

  4. Re-architecting

    Re-architecting is the process of completely reworking the application’s architecture to conform to contemporary guidelines. It frequently calls for a phased strategy that efficiently manages the process while resolving architectural concerns.

  5. Complete Replacement

    When legacy systems are sufficiently antiquated, a complete replacement might be required. Although this approach offers a new beginning, there is a risk of disturbances throughout the shift.

Types of Legacy System Modernization

The various approaches were covered in the section above. But here are different types of legacy systems that require different degrees of updates to modernize. They are:

  1. End-of-life (EOL)

    End-of-life legacy systems are perhaps the most prevalent sort of legacy systems. In actuality, EOL systems have a very straightforward explanation. Developers and vendors are also businesses. They also have to keep up with emerging technological trends. This typically translates to systems built with older legacy software losing maintenance due to a loss of resources and knowledge or becoming too costly to maintain. When this happens, vendors stop selling the products and offer updates or support for EOL legacy systems.

    End-of-life (EOL)

    Image Source

  2. Limited Lifespan

    Every software comes with a limited lifespan. Once the lifecycle is over, the support can be in the form of updates or patches, and after some time, the support is also stopped by the vendor. As in the case of Windows XP, we see that Microsoft has now stopped any kind of support for the operating system. A comparable situation is for legacy systems. Either the system owner must move to a similar alternative, or they must switch the software completely.

  3. Stunted Scalability

    Age-old software and systems that were created while a particular type of infrastructure was accessible. As such, they are unable to support emerging technologies like artificial intelligence (AI), the cloud, and big data. In this situation, a new option will need to be investigated because the legacy solution will not be able to expand with the business.

    For instance, COBOL is a primitive programming language, and knowledge of it can help develop novel ideas, but it is unable to support the latest modern programming languages. Hence companies went on modernizing the language and made the shift to new languages.

Factors Influencing While Selecting the Best Application Modernization Services Company

Considering the inherent complexity of modernization, picking a skilled partner is crucial. Here are some things to consider before choosing:

Experience with related app modernization initiatives: Previous results are a good indicator of future performance, and having worked on related projects before helps one avoid potential pitfalls.

Knowledge of your company: The ideal partner is conscious of the particular difficulties faced by your sector. This is essential for customizing the roadmap for app modernization.

A thorough approach to system architecture: Seek a partner who can articulate their approach to designing and constructing your new system with assurance and clarity. This demonstrates their level of competence.

Deep Technical Knowledge: It is advised to partner with a company that has expertise in the domain of legacy system modernization and thorough knowledge of architectures, microservices, platforms, and other things.

SolGuruz is a leading name in the industry for legacy system modernization, with detailed knowledge of migrating legacy systems to the latest technology. Through native connections to core systems and application architectural alignment, SolGuruz facilitates smooth and rapid data interchange, maximizing the capabilities of an organization’s current infrastructure.

Do not Let Legacy Systems Hold Your Business Growth


What are the primary methods for modernizing outdated systems?

The different approaches to migrating the legacy systems are rehosting, refactoring, re-platforming, and others. The approaches are decided by looking at the situation at hand when dealing with legacy systems.

Why are companies required to update their outdated systems?

Outdated systems not only hold back growth but also incur costs for your business. Maintenance cost is one case that you have to bear if you are working with legacy systems.

Which methods of modernizing legacy systems will be most effective for my company?

The most suitable method can only be decided when you discuss the issues with the legacy software modernization company. The experts can better understand the situation and recommend the best possible solution to you. Sometimes you can opt for custom software solutions as well while migrating to the latest technology.

Is there anything from my old system we can utilize again?

System migration causes data losses and may cause compatibility issues. However, a suitable legacy software modernization company can suggest the best solution while understanding your system requirements and your business requirements.

This could be also interesting

Examine the travel apps of the future. The blog goes into great detail about the features, types, and advantages. Anyone interested in developing a travel app should read the travel app development guide.
This detailed blog covers multiple industries and showcases use cases of AI in 2024. Learn how you can redefine your business with the latest AI modifications.
Master the art of legacy system modernization with our in-depth guide to overcoming challenges and improving your business ROI with legacy application modernization.

Get latest insights right in your inbox

Sign up for our free newsletter

Subscribe to SolGuruz insights in your inbox

Ready to Partner With Us?

Get ready to create something GREAT! Let us Build
Great Things Together!!






    Unlock the potential of your digital presence. Claim Your Free UI/UX Audit

    Fill the form to get started with our comprehensive UI/UX evaluation for your project. We’ll send you the full audit report in 2 days.