Diversifying IT Supply Chains: A Practical Approach to Smooth Vendor Handover

As Japan’s IT talent shortage continues to grow, companies are facing increasing pressure to rethink how they build and manage their development structures.

At the same time, many organizations are re-evaluating their reliance on current outsourcing models due to concerns about security, intellectual property, and operational continuity. For these businesses, the discussion has shifted from merely seeking cost efficiency to focusing on creating a more resilient and flexible IT supply chain.

To explore this topic, we spoke with Mr Nguyen Hai Duong, COO at VTI Japan, who has spent more than 20 years working across Japan and Vietnam in IT outsourcing and system development. Drawing from his experience supporting manufacturing, healthcare, and public-sector clients, he shares practical insights on vendor diversification, operational handovers, and what companies should prioritize when building long-term outsourcing strategies.

Why IT Supply Chain Diversification Matters More Than Ever

Japan’s IT industry is facing multiple pressures at once: a growing shortage of engineers, rising security concerns, and increasing uncertainty around global outsourcing risks. According to Mr Duong, these challenges are pushing companies to reassess how they structure their vendor ecosystem and evaluate long-term outsourcing strategies.

This shift is becoming more evident at the organizational level as well. 74.7% of Japanese respondents indicated that they have a formal risk management and insurance department, compared to 68.4% globally (Aon, Feb 2026). This reflects how operational resilience and risk diversification are increasingly integrated into business decision-making.

“Both domestic and overseas IT vendors may have limitations or gaps in capability.”

Rather than relying too heavily on a single partner, many organizations are now exploring ways to diversify their IT supply chain to reduce risk while improving flexibility, scalability, and competitiveness.

However, Mr Duong emphasizes that diversification does not mean replacing vendors overnight. The process should happen gradually, starting with smaller projects, carefully transferring operational knowledge, and building operational stability step by step before expanding further.

This phased approach helps minimize disruption while giving new partners time to adapt to existing systems, workflows, and communication structures. Beyond risk management, diversification can also accelerate innovation and improve cost competitiveness when implemented strategically.

Why Successful Vendor Handover Depends on Process

One of the biggest concerns companies face when expanding their vendor network is operational continuity.

Introducing additional vendors naturally increases management complexity, especially when systems and operational knowledge have been built over many years. In these situations, the success of diversification depends heavily on how well the handover process is designed and executed.

“There’s no need to suddenly change vendors. It’s important to proceed step by step.”

Mr Duong shared several examples where VTI supported large-scale vendor transitions for Japanese enterprises.

In one case, a major manufacturing company needed to relocate operations from an existing offshore destination due to intellectual property concerns. The project involved transitioning operations, maintenance, and support for more than ten systems previously managed by a 20-member team.

Over approximately three months, VTI coordinated the handover by gradually transferring operational knowledge, support responsibilities, and internal processes while simultaneously expanding the new offshore structure in Vietnam. According to customer feedback, the transition was completed smoothly, and operations remained stable after the migration.

In another case, VTI took over operations and maintenance across dozens of projects involving around 100 personnel after an existing domestic vendor faced recruitment difficulties. Despite the scale and short timeline, the transition was completed within three months by establishing a structured handover model and allocating the necessary resources early in the process.

These examples highlight an important point: successful vendor transitions rely not only on technical capability but also on structured knowledge transfer, operational alignment, and close coordination between teams.

Building a Scalable Offshore Collaboration Model

According to Mr Duong, one of VTI’s key strengths lies in its “Dual-based model” between Japan and Vietnam, a structure designed to balance close customer alignment with scalable delivery capabilities.

The model consists of:

• A Japan-based team focused on communication, requirements definition, and quality alignment
• An offshore team in Vietnam that provides scalability, flexible resource allocation, and rapid execution

Together, this model allows teams to balance precision with execution, something increasingly important as companies expand and diversify their vendor ecosystem.

This operational structure is further supported by VTI’s proprietary “4S” framework, developed through long-term collaboration with Japanese clients.

The framework consists of four stages:

• Setup – preparing documentation, processes, and operational structures
• Scratch – starting with smaller projects to validate workflows and identify issues
• Stabilize – refining processes and verifying operational quality
• Scaling – expanding the model after stability has been established

By combining the Dual-based model with a phased handover approach, VTI has supported projects scaling from small teams to large multi-project structures while maintaining operational consistency and quality.

As outsourcing models continue to evolve, companies are increasingly looking for partners that can provide not only development resources but also structured operational support and long-term scalability.