The business problem with M&A
Many corporate acquisitions follow a well-known pattern. The deal is identified, investment banks are engaged, financial due diligence is carried out by a well-reputed audit firm, and comprehensive analyses are prepared. The Excel models are convincing, the synergies look attractive, and the board receives a strong basis for decision-making. The acquisition appears logical from both strategic and financial perspectives. Once the transaction is signed and the ”closing” is completed, the deal is often perceived as completed and the success secured. This is where many organizations make their biggest mistake. In the current case, the acquisition was carried out according to the textbook from a transactional perspective. Financial DD was carried out by a Big Four firm; investment banks participated in the process, and the financial indicators pointed to a very promising investment. The risks were considered manageable, and the expected synergies justified the price of the deal.
Six months later, however, reality catches up with the organization. Sales have decreased while administrative costs have increased sharply. The synergies underlying the investment calculation have not been realized and the expected value creation has failed to materialize. The management begins to question the deal despite the fact that the financial analysis before the acquisition may have been fundamentally correct. The central explanation is that the focus was almost exclusively on the transaction itself while the integration work after the acquisition was neglected. When the deal was completed, consultants, advisors, and project resources left the organization because the assignment was deemed completed. No plan for Post Merger Integration (PMI) was ever established. No integration leader was appointed. No one had a clear mandate to coordinate people, processes, systems, culture, organization, and synergy realization.
For other executives and M&A managers, this is an important lesson. A corporate acquisition is not complete when the agreement is signed or entered into. That is when the real work begins. Most failed acquisitions fail not because of valuation or financial DD deficiencies, but because the organization lacks the ability to implement the integration and translate the theoretical value of the deal into practical results. The most important conclusion is therefore that M&A must be viewed as an integration program, not as a transaction project.
Historical overview
Historically, M&A processes have evolved with a strong emphasis on transaction management. Companies invest significant resources in valuation models, financial due diligence, legal review, and negotiation strategy. This is natural because an incorrect price or an undetected financial risk can have major consequences. At the same time, experience from a large number of corporate acquisitions shows that value creation is rarely determined at the signing stage. It is determined during the subsequent 12-24 months when two organizations are to function as one. In the current case, the development appears to have followed a classic pattern.
Phase 1: Employment analysis
Management identifies an attractive acquisition target. Strategic motives are defined as:
- Increased market share
- Access to new customers
- Scale advantages
- Cost synergies
- Enhanced competitiveness
Investment banks and advisors support the process and create a strong investment logic.
Phase 2: Due Diligence
Financial due diligence is being carried out. The focus is on:
- Historical profitability
- Cash flow
- Balance sheet
- Debt
- Financial risks
The result confirms that the target company meets the investment criteria.
Phase 3: Closing
The agreement is implemented. The organization often sees this as the end of the project. Press releases are published, the board congratulates the management, and the project organization is gradually dismantled.
Phase 4: Integration vacuum
This is where the problems begin. In many companies there are now:
- Two sales organizations
- Two IT environments
- Two administrative structures
- Two cultures
- Two management logics
But no common integration plan. Customers face uncertainty about contact channels. Employees don’t know which roles apply. Decisions are made slowly because the responsibility structures are unclear. The result is often the same:
- Sales are slowing down
- Customer service is prioritized less
- Administrative costs increase
- Synergies are lacking
- The frustration is growing
The historical mistake is therefore not that DD was implemented incorrectly, but that the integration work was never treated as the critical phase where the investment's value would actually be realized.
Our view on the rotor problem
The PMI was completely missing
The most important aspect of the merger is that Post Merger Integration was not planned or implemented as a separate program. Symptoms explained:
- Reduced sales
- Delayed synergies
- Safety of the herd
- Operational inefficiency
Priority: Very high.
No integrator was appointed
No one had a clear mandate to lead the integration between the activities. When everyone is responsible for the integration, in practice no one is responsible for the integration. Symptoms explained:
- Coordinated initiatives
- Double work
- Conflicts between functions
- Lack of follow-up
Priority: Very high.
Focus on transaction rather than value realization
The organization defined success as completed business rather than realized business value. Symptoms explained:
- Consultants completed their assignments at closing
- The board lacked integration measures
- Synergies were never followed up
Priority: High.
Culture and change management were ignored
People do not integrate automatically just because legal structures are merged. No cultural DD had been done. Symptoms explained:
- Productivity decline
- Resistance to change
- Personnel turnover
- Sales disruptions
Priority: Medium to high.
Owners lacked synergies
The synergies identified during the DD were never converted into concrete activities with responsible people and defined KPIs. Symptoms explained:
- Synergies exist only in spreadsheet models
- Financial goals are not achieved
Priority: High.
Applicable tools and areas of knowledge
To avoid this type of situation, organizations should use a number of complementary M&A tools.
Post Merger Integration (PMI)
The PMI is the most important tool because it creates the bridge between business logic and actual value realization. A PMI program includes:
- Organization
- Processes
- IT systems
- Customer management
- Governance
- Culture
The PMI should be started before closing and not after.
Integration Management Office (IMO)
An IMO works in the same way as a PMO, but with a focus on integration work. The IMO is responsible for:
- Coordination as an integrator
- Risk management
- Synergy Realization
- Group reporting
Synergy Realization Framework
Each identified synergy must have:
- An owner
- An economic value
- A timeline
- A KPI
Otherwise, it will most likely never be realized.
Change management
Frameworks such as ADKAR or Prosci help the organization manage the human dimension of the acquisition. Integration often fails due to people and culture, not because of economics.
Governance for M&A
The board and management should follow up:
- Integration status
- Customer retention
- Employee retention
- Synergy Realization
- Operational stability
Not just EBITDA and sales.
Implementation of the Chief of Staff
In this type of situation, a Chief of Staff function is particularly valuable because the role can serve as the organization's integrator.
Mandate
The Chief of Staff reports directly to the CEO and leads the integration program on behalf of the management. Responsibility:
- PMI leadership
- Synergy Realization
- Management coordination
- Risk assessment
- Reporting to the board
Establish an Integration Management Office
The following workflows should be established:
- Commercial
- Operations
- Finance
- HR
- IT
- Legal & Compliance
Each work stream is led by a responsible manager while the Chief of Staff coordinates the overall plan.
The first 100 days
Day 0-30
- Establishing IMO
- Define integration goals
- Mapping critical risks
- Select a co-owner
Day 30-60
- Implementing Quick Wins
- Secure customer relationships
- Identify overlapping costs
Day 60-100
- Consolidate processes
- Harmonize the organization
- Ensure measurement of synergies
Key figures
Financial:
- Turnover
- EBITDA
- Realized synergies
Operational:
- Degree of integration
- Decision time
- Project status
People:
- Personnel turnover
- Retention of key personnel
- Employee engagement
Summary
This case illustrates one of the most common mistakes in corporate acquisitions: treating M&A as a transaction instead of an integration program. The financial due diligence process can be properly conducted, the investment banks may have delivered a strong investment case, and the audit firms may have identified the relevant financial risks. Yet the deal may fail if the organization is unable to integrate the two businesses after closing. The key issues are:
- The PMI was missing.
- No integrator was appointed.
- The focus was on the transaction rather than the realization of value.
- Culture and change management were neglected.
- The owners lacked synergies and follow-up.
The most important lesson for other organizations is therefore: A corporate acquisition does not create value when the agreement is signed. The value is created or destroyed during the first 12-24 months of integration. The recommended next step for any organization facing an acquisition is to establish a PMI program already before closing, appoint an integration manager, and measure success based on realized synergies rather than the completed transaction. This significantly increases the likelihood that the deal that looked fantastic on paper will also be successful in reality.
