IT Consulting Case Studies: Wins & Failures

These six case studies break down the decisions that made or broke some of the biggest names in IT consulting, so founders can borrow the right moves before they commit to theirs.

Two men in suits discussing work at a table with a laptop, documents, and coffee cups in a modern office setting.

Case 1

Some IT projects seem simple at the start, but things can change quickly. Deadlines get missed, costs go up, and plans stop working as expected. This is where IT consulting case studies become useful, as they show what really happens in real situations.

As you go through different examples, a clear picture starts to form. Looking at success IT consulting cases makes it easier to understand which decisions lead to good results and which ones create problems. Each case connects one idea to the next, helping you follow the journey step by step while learning in a simple and clear way.

1: Accenture Case Study – The Master of the Pivot

Big companies often find it hard to change. What worked for years can suddenly stop working. A pivot consulting firm knows when it is time to move and how to do it the right way.

Accenture is a great example. It started as a global professional services firm focused on strategy and technology. Founded in 1989 after separating from Arthur Andersen, it slowly moved away from its old accounting roots and stepped into digital and cloud. That shift changed everything and turned it into a market leader.

About the Business

Type: Global professional services / Strategy & Technology
Founded: 1989 (Spun off from Arthur Andersen)
Revolution: Successfully pivoted a "legacy" accounting-focused consultancy into the world’s largest digital and cloud powerhouse.

The Challenge

In the early 2000s, Accenture was known for back office outsourcing and ERP systems like SAP and Oracle. This worked well for years.

As the market evolved, businesses began shifting toward digital and cloud solutions. Expectations changed, and traditional services were no longer enough.

This created a clear turning point. Accenture had to adapt or risk becoming outdated in a fast moving industry.

The Strategy

Faced with change, Accenture did not wait. It acted quickly and made clear, focused decisions to move forward.

One major step was a strong investment in acquisitions. The company spent billions to bring in smaller, specialized firms working in areas like creative services, artificial intelligence, and cybersecurity. Between 2019 and 2021 alone, more than 90 companies became part of its growing network, helping it build new capabilities at a fast pace.

At the same time, a new direction was introduced through Accenture Interactive, now known as Accenture Song. This move combined creative design with technical delivery, allowing the company to compete with firms like McKinsey & Company and WPP.

Alongside these changes, strong attention was given to people. Around $1 billion was invested every year to train a workforce of over 700,000 employees in cloud and AI skills. This ensured the team could support the company’s new direction.

Each step connected smoothly, helping Accenture move from its old model into a modern digital consulting leader.

The Results

All these steps started to show clear results over time. Accenture moved into a strong position in the market.

Revenue reached $64.1 billion in FY2023, showing steady and large scale growth. At the same time, the company became a leading partner for Amazon Web Services, Microsoft, and Google Cloud, strengthening its role in the cloud space.

A clear lesson also came from this journey. Growth did not come from simply adding more people. It came from bringing in new ideas, new skills, and new businesses, then connecting them into one strong global system.

Case 2

2: Thoughtworks Case Study – The Intellectual Engine

Most consulting firms focus on delivering services. A few take a very different path. They focus on shaping how the entire industry works. That is where software consulting meets thought leadership consulting.

Thoughtworks stands out for this reason. Founded in 1993, it built its reputation as a premium software consultancy. Instead of only selling project work, the company focused on building strong methods and ideas. Over time, it became known for helping define modern Agile development and changing how large companies build software.

About the Business

Type: Premium software consultancy
Founded: 1993
Revolution: They didn't just sell hours; they sold Methodology. They essentially "invented" modern Agile software development for the enterprise.

The Challenge

In the 1990s, most software projects followed the Waterfall model. Work was done step by step, often taking a long time to complete. Projects were slow, expensive, and many failed before delivering real value.

Thoughtworks saw this problem clearly. Large companies needed a better way to build software, but they were not ready to trust a new approach.

This created a difficult situation. Thoughtworks had to prove that a faster and more flexible method could work, even for large and complex projects.

The Strategy

Instead of following the old system, Thoughtworks introduced a completely different way of thinking.

One key step was a strong focus on thought leadership. The company hired some of the best engineers in the world, including Martin Fowler. Their ideas shaped how modern software is designed. Tools like the Thoughtworks Technology Radar became trusted guides for technology leaders.

At the same time, the company strongly promoted Agile development. Rather than taking on simple maintenance work, they focused on complex and high value projects. They charged higher fees but delivered clean, high quality code that avoided long term issues like technical debt.

Another important part of their strategy was culture. Thoughtworks built a reputation around social impact and purpose. This helped them attract skilled professionals who wanted meaningful work and were not interested in traditional consulting roles.

Each of these steps worked together, helping the company stand out in a crowded market.

The Results

Over time, these decisions created strong and lasting results. Thoughtworks grew into a respected name in the global consulting space.

The company went public in 2021 with a valuation of around 9 billion dollars. This showed the strength of its business model and its influence in the industry.

Its impact went even further. Many modern software practices, including continuous integration, continuous delivery, and microservices, became widely used through the work of Thoughtworks consultants.

A clear lesson comes from this case. A consulting firm can stand out by becoming the smartest voice in the room. When a company helps define how the industry works, it does not need to compete on price. It leads by knowledge and trust.

Case 3

3: EPAM Case Study – The Engineering Pipeline

Can a company change how the world sees outsourcing? That question sits at the center of this story. A strong growth strategy combined with a clear vision can turn doubt into trust. That is exactly what this EPAM systems company overview reveals.

EPAM Systems started in 1993 as a digital product development company. From the beginning, it focused on building strong engineering talent. Over time, it proved that teams from Eastern Europe could deliver the same high quality as top global firms. That shift changed how companies think about outsourcing.

About the Business

Type: Digital Product Development Services
Founded: 1993
Revolution: Proved that Eastern European engineering talent could be scaled into a top-tier global delivery machine that rivals US-based firms in quality.

The Challenge

In the early days, outsourcing had a bad reputation. Many businesses believed it meant low cost but also low quality.

EPAM Systems had to change this perception. It was not enough to deliver code. The company needed to prove it could become a trusted partner in building real products.

This created a clear challenge. Moving from a “cheap coding shop” image to a strategic product partner required a complete shift in how clients saw the company.

The Strategy

To change its position in the market, EPAM Systems focused on building strong internal capabilities. The goal was simple. Deliver high quality work every time and change how clients see outsourcing.

This approach was built around a few key ideas:

An engineering first mindset shaped everything, supported by a strong internal training system that worked like a university to develop top talent
Deep expertise was built in industries like life sciences and financial services, allowing teams to take part in product design, not just coding
Strong resilience was shown during the 2022 war in Ukraine, where teams were quickly relocated and work continued without major disruption

Together, these steps created a strong foundation. Over time, EPAM moved from being seen as a low cost option to becoming a trusted engineering partner.

The Results

Over time, these decisions delivered strong and consistent results. EPAM Systems maintained steady growth of 20 to 30 percent each year for more than a decade.

Even during major regional challenges, the company reached revenue of 4.8 billion dollars in 2022 and 2023. This showed the strength of its model and its ability to adapt.

A clear lesson comes from this case. Strong delivery builds a strong reputation. When a company becomes known for reliable and high quality engineering, clients stay longer and trust grows over time.

Case 4

4: Globant Case Study – The "Digital Native" Experience

Enterprise tools were not always built for people. They worked, but they often felt slow, confusing, and hard to use. That gap opened a new direction for enterprise software, where experience became just as important as function.

Globant built its entire approach around this idea. Founded in 2003 in Argentina, the company focused on digital journeys and IT services, but with a fresh mindset. It treated business software the same way people experience apps like Instagram and Netflix. Simple, engaging, and easy to use. That shift changed how enterprise tools could feel.

About the Business

Type: Digital Journeys / IT Services
Founded: 2003 (Argentina)
Revolution: Focused on "Emotional" digital experiences. They were the first to treat enterprise software like consumer apps (Instagram/Netflix).

The Challenge

For years, corporate systems were built with one goal. Make them work. User experience was rarely a priority.

Globant saw the problem clearly. Employees were using modern apps in daily life, but at work they had to deal with tools that felt outdated and frustrating.

This created a simple but powerful opportunity. Bring great design into the enterprise world and make software people actually enjoy using.

The Strategy

To make this vision real, Globant built a model that blended creativity, technology, and culture.

The company introduced a “Studios” model, organizing teams around areas like AI, gaming, and the metaverse. This kept them flexible like a startup while still growing at a global scale
Gaming ideas were brought into business applications. By working with brands like The Walt Disney Company and Electronic Arts, they made enterprise tools more interactive and engaging
A strong internal culture was built through a platform called StarMeUp, which later became its own product, showing how internal ideas can turn into real business value

Each step added something important. Together, they helped Globant create a new kind of consulting model focused on experience.

The Results

Over time, this approach delivered clear and visible results.

The company reached a market valuation between 8 and 10 billion dollars on the New York Stock Exchange
It became known as a modern and creative consultancy that attracts top young talent
It proved that enterprise tools can feel as engaging as consumer apps when design is treated as a priority

A simple lesson stands out here. When people enjoy using a product, they use it more, and that creates real impact.

Case 5

5 (FAILED): EDS and HP Case Study – The $13.9 Billion Culture Clash

Some deals look perfect at the star, but slowly fall apart. This is one of those stories. It clearly shows the real reasons for failure of mergers and acquisitions and how big plans can turn into costly project failures.

The Business Context

Hewlett-Packard acquired Electronic Data Systems in 2008 for 13.9 billion dollars. The goal was simple. Compete with IBM by combining hardware and consulting services into one strong offering.

On paper, it made sense. One company builds the technology, the other runs it. Together, they aimed to serve large enterprises end to end.

The "Bitter Pill" Details

Problems did not appear immediately, but they were there from the start.

Culture became the biggest issue. HP followed a Silicon Valley style focused on innovation, while EDS had a rigid, cost focused, almost military style culture. These two ways of working never came together
Timing also worked against them. While they focused on managing physical data centers, companies like Amazon Web Services and Microsoft Azure were building cloud solutions and changing the industry
The financial impact was heavy. Within just four years, HP had to write down 8 billion dollars from the deal

Small gaps turned into big problems, and fixing them became harder over time.

The Result

The outcome was clear. Hewlett-Packard eventually split into two companies. The consulting side, originally EDS, was spun off and later merged into DXC Technology.

One simple lesson stands out. You cannot force two cultures to work together. In consulting, people and culture matter the most. If they do not align, even a billion dollar deal can lose its value.

Case 6

6 (FAILED): IBM vs. Hertz Case Study – The $32M "Agile" Disaster

Big budgets do not guarantee success. Sometimes, they make failures even bigger. This case shows a real IT project failure and the lessons behind the Hertz IBM lawsuit.

The Business Context

Hertz hired IBM in 2016 for a massive digital transformation of their website and mobile apps.

The cost quickly added up. $32 Million in fees were paid before the project was eventually scrapped.

The "Bitter Pill" Details

The problems started during execution and kept growing over time.

Deadlines were missed multiple times. When the “finished” product was delivered, it did not even work on tablets or across all global regions as requested
Despite promises of modern methods, the project was managed with outdated and rigid processes. Changes were slow and expensive
The situation escalated. In 2019, Hertz sued IBM, claiming the code was “garbage” and that their requirement for an “extensible” platform was ignored

Each issue made the next one worse, turning a large project into a major failure.

The Result

The outcome was damaging for both sides. It became a PR problem and a widely known example of failure in large IT projects.

It also changed how companies think. Many started moving away from “Big Box” consultants and began choosing smaller, specialized firms.

One clear takeaway stands out. Transparency matters. If a working prototype cannot be shown within the first 3 months, there is a high risk of building a $30M paperweight.