When Waterfall is effective
Waterfall is well suited for: - large infrastructure projects: telecom, energy, construction; - regulated industries: banks, the public sector; - systems where the cost of error is high: nuclear power, oil, and gas.
Why CIS businesses choose an Agile-Waterfall hybrid, how the model works and where it delivers the best results.
In 2024, more than 55% of CIS project managers have acknowledged that they use hybrid management methodologies, combining elements of Agile and Waterfall. MTS, Gazprom Neft, and Tinkoff have built their own models: product teams work in Agile, while infrastructure projects are managed in a waterfall format. This hybrid helps companies speed up releases while keeping budget and security under control.
Core Agile principles are Fast development cycles. A sprint lasts 1-4 weeks. - Self-organizing teams. The team makes decisions independently, without constant approval from above. - Incremental delivery of value. Each sprint delivers a working product or part of one. - Customer focus. Results are evaluated through the lens of convenience and value for the end user. - Transparency and feedback. Regular meetings, demos and retrospectives help quickly spot and fix problems.
Agile frameworks. Frameworks are specific approaches that help teams apply Agile principles in practice. They define the way work is organized: how tasks are planned, how long the development cycle lasts, who makes decisions, and how the team evaluates results.
| Framework | Features | Pros | Cons |
|---|---|---|---|
| Scrum | Sprints last 1-4 weeks, with clear roles and rules | Transparency, regular feedback, discipline | May be too complex for small teams |
| Kanban | Visual task tracking on a board, without fixed sprints | Easy to implement, flexible, continuous flow | There is no Scrum-like rhythm, so employee overload is possible |
| SAFe | Scaling Agile through "release trains" | Managing hundreds of teams, balancing strategy and tactics | Difficult to implement, high bureaucracy |
| LeSS | One Product Owner for several Scrum teams | Easy to scale, minimal artifacts | Suitable only for 2-8 teams; beyond that, limitations appear |
| Nexus | An extension to Scrum for 3-9 teams | Team synchronization, minimal changes | Requires mature Scrum, otherwise chaos |
53% of project managers in CISapplyIn Agile, 81% of companies use Scrum as their main framework. When Agile is especially effective Agile is adopted where: - hypotheses must be tested quickly and products launched fast; - a volatile market demands rapid adaptation; - customer expectations keep rising - in fintech, telecom, and e-commerce; - employee engagement matters: Agile increases Team NPS.
Agile works less well where projects are capital-intensive and high-risk - in construction or nuclear energy. There it is more often combined with Waterfall.
Waterfall, or the Waterfall model, is a classic management model in which work is carried out strictly by stages, from requirements gathering, design, and development to testing, implementation, and support.
To start a new phase, the previous one must be completed. Advantages: -
Budgets and timelines are easy to control. -
It is suitable for projects subject to strict regulatory requirements. Drawbacks: -
It is hard to change processes after work has started. -
Late feedback: a working product appears only when the project is complete. -
High risks if requirements were gathered incompletely from the start.
Despite Agile's popularity, Waterfall remains the key methodology in a number of industries: - MTS uses Waterfall for infrastructure projects: network construction, data centers, and equipment modernization. - Gazprom Neft uses Waterfall in capital projects: pipelines, refineries.
This helps minimize risks on multibillion-dollar construction projects. - Rosatom uses Waterfall in power unit construction, where mistakes can cost lives and huge amounts of money. - In the public sector, for example in integrations with federal registries, Waterfall remains the dominant approach because of regulatory requirements.
Waterfall is well suited for: - large infrastructure projects: telecom, energy, construction; - regulated industries: banks, the public sector; - systems where the cost of error is high: nuclear power, oil, and gas.
Agile and Waterfall use different approaches to product creation. Waterfall is based on a strict sequence of phases, while Agile relies on short iterations with regular feedback. Agile It is effective for building digital products, where it is important to test hypotheses quickly, respond to user needs, and release updates frequently.
It increases team engagement and speeds up time to market for services. Waterfall It is suitable for projects where stability and compliance are critical: construction, manufacturing, and the public sector. Fixed budgets, deadlines, and complete documentation matter here.
Agile-Waterfall Hybrid - Agile-WF, Water-Scrum-Fall or a "two-speed model" is a project management method that combines speedand reliability. Agile teams release new features every 2-3 weeks, while Waterfall processes ensure budget control, security, and regulatory compliance. This speeds up releases without putting infrastructure at risk.
Why the hybrid emerged. In CIS, business operates under double pressure: - Strict regulation. Banks must align projects with the Central Bank, telecom companies must comply with Roskomnadzor requirements, and industrial companies must meet FSTEK and Rostechnadzor requirements. This calls for waterfall procedures. - High competition. Customer-facing services need to be updated every week.
If you delay, customers will go to competitors -60% small and medium-sized companies feel high competition, especially in retail and consulting. Hybrid advantages 1. A balance of speed and stability. Agile makes it possible to release new features every 2-3 weeks, while Waterfall ensures architecture and security are not compromised. 2. Compliance with regulatory requirements. In banking and the public sector, it is impossible to fully abandon waterfall.
3. Resource optimization. Agile teams focus on customer-facing services, while Waterfall teams focus on infrastructure. 4. Risk management. Waterfall milestones help control budget and timelines, while Agile reduces the risk of failed hypotheses. 5. Flexibility across different contexts. In telecom and industry, construction projects are run with waterfall, while digital services are run with Agile.
Sber is CIS's largest bank, serving more than 100 million customers. The volume of IT work is huge: mobile banking, online services, integrations with the Central Bank, security, marketplaces. In the early 2010s, Sber worked under classic Waterfall. This meant implementation cycles of 9 to 12 months, lots of approvals, and slow market response. As competition from Tinkoff and MTS Bank intensified, it became clear the approach had to change.
In 2017, a project to introduce Agile in product teams began, which included: 1. Creating cross-functional teams. Each team got a full set of roles: developers, analysts, testers, business specialists. 2. Introducing Scrum and Kanban. The main working format is two-week sprints. 3. Employee training. More than 10,000 employees completed training in Agile practices. 4. Introducing release trains. To synchronize dozens of teams, Sber adopted the SAFe approach.
However it turned out to be impossible to fully abandon Waterfall.
Reasons: - Integrations with the Central Bank of the CIS. Any changes must be certified and documented. - Security. Full control over architecture and infrastructure is required. - Regulatory compliance. The financial sector requires detailed reporting for the Central Bank and FSTEC. Results: - speeding up product launches in 7x: average release time decreased from 9-12to 1-2 months; - an increase in the number of deployments per year in 4x; - higher customer satisfaction; - greater employee engagement in development. What to consider: 1. Agile is impossible without culture. People need to be trained, not just processes changed.
2. A hybrid is needed. Agile is good for products, Waterfall for infrastructure and compliance. 3. Metrics matter more than slogans. Sber measured the impact through time-to-market, deployment frequency, and NPS. 4. Scaling requires SAFe. Without release trains, dozens of Agile teams do not stay synchronized.
MTS is CIS's largest telecom operator with more than 80 million subscribers. Beyond core telecom services, the company actively develops digital services: mobile apps, TV, streaming services, and fintech offerings. Until the mid-2010s, all projects were run using the Waterfall model. That made sense for building networks and large-scale infrastructure, but it worked poorly for digital products: launching new services took 9-12 months, while the market required releases every 1-2 months.
MTS did not give up Waterfall entirely, but instead split projects with two tracks. Waterfall track: - building base stations, data centers, and upgrading network infrastructure; - projects with predefined deadlines, budgets, and strict contractor contracts. Agile track: - digital services: "MTS Music", "MTS TV", the "My MTS" super app; - work based on Scrum and Kanban, two-week sprints, frequent releases. Track synchronization: - through a portfolio office and release gates; - Agile teams release products every 2-3 weeks, while Waterfall projects set major milestones every few months. Results: - Shortening the cycle for launching new digital services from 9-12 to 3-4 months. - The ability to test hypotheses on a limited user group within 2-4 weeks. - Fewer integration errors with network infrastructure thanks to clear Waterfall stages. - Higher team engagement and faster development. What to consider: 1. There is no need to redo everything at once. It is important to keep waterfall where mistakes are costly.
2. Agile works best in digital services. Fast releases and experiments are needed here. 3. A portfolio office is needed. It synchronizes teams working at different speeds. 4. Culture matters more than process. Without trust and autonomy, Agile turns into "pseudo-Agile".
- this is a two-speed management model.
It defines which processes run in Agile, which in Waterfall, and how they are synchronized.
The slow Waterfall track - long-term planning, budgeting, architecture control, and compliance with regulatory requirements. 2. Fast Agile cycle - product teams that release new service versions every 2-4 weeks.
Key architecture elements 1. "Release train".
Teams synchronize every 2-3 months to release coordinated builds. 2. Value stream mapping.
Helps determine which processes should remain waterfall-based and which can be accelerated through Agile. 3. Portfolio office.
Manages the balance of pace, tracks deadlines and risks. 4. Shared metrics. Time-to-market, defects, customer NPS, and employee NPS.
The analysis and architecture phase follows Waterfall.For 1-2 months Key requirements, architecture decisions, and budgets are fixed. In banking, this means approval with the Central Bank; in telecom, network capacity calculations; in industry, plant design. 2. MVP development with Agile.Teams work in fast sprints on 2 weeks. At the end of each one, the product is demonstrated.
3. Mixed integration phase.Over the month, Agile teams combine their increments into a single release.
Security, compatibility, and load testing are performed. 4. Release and retrospective in Agile.The final product reaches the market.
The next development cycle starts in parallel.\ The best way to plan a hybrid project to get the most value from the IT budget isIT consulting.
The economics of a hybrid approach are measured not only by faster releases, but also by lower costs. CIS companies record The effect is already visible in pilot projects: half of participants note that the delivery cycle is reduced by 1.5-2x, and after scaling - in 3-4x. This means digital services begin generating revenue in 2x faster, and the cost of rework decreases thanks to early feedback.
- Time-to-Market - the average time from idea to product launch.
At MTS, the service launch cycle was reduced from 9-12 to 3-4 months. - Release frequency.Shows how well the company has learned to work iteratively. In
At Sber, the number of deployments increased 4x after the move to a hybrid model. - Escaped defects - the number of errors that reached production.
Reflects the quality of testing and integration processes. At
At Rostelecom, after adopting the hybrid model, the number of integration defects decreased by 30%. - Mean time to recovery (MTTR) after an outage is a key resilience indicator. Agile teams respond to incidents faster. - Customer loyalty index (NPS)- shows how willing customers are to recommend the service.
Reflects product quality through users' eyes. At
- Employee loyalty index (eNPS) - shows employee engagement. Agile teams are usually more motivated. In
At Sber, eNPS rose after the switch to the hybrid.
Formal Agile. Companies say they work in Agile, but in practice teams have no autonomy: tasks come from above, and only managers make decisions. As a result, Agile turns into a set of rituals - standups, sprints - with no value. Consequences: - Loss of team motivation. - Slowdown instead of acceleration - releases go out 3-6 months late. - Change theater. Example: in a number of CIS state-owned corporations launched Agile projects without changing the culture.
Result - teams were following the same waterfall plans, only split into "sprints". Process gap between Agile and Waterfall If Agile and Waterfall teams are not synchronized, the product gets "stuck": some wait months for integrations, while others see their colleagues as chaotic.
Result - delayed releases and rising costs. Consequences: - Agile teams wait months for integrations. - Waterfall teams complain about the "chaos" of their Agile colleagues. - Delays appear at critical stages. Example: in MTS telecom projects, Agile developers quickly released new services, but integration with the network infrastructure was often delayed without release gates.
Opaque dependencies. When one team works in Agile and another in Waterfall, dependencies emerge between them that are hard to track. As a result, the product cannot launch until the waterfall stream completes its phase. Consequences: - Longer waiting times. - More blockers. - Loss of Agile speed benefits. Example: at Sber, before release trains were introduced, the mobile banking teams depended on waterfall integrations, which led to release delays.
Risk of "the worst of both worlds": if a company adopts Agile only halfway and does not keep Waterfall discipline, chaos follows: there is neither speed nor control. This is the worst-case scenario. Consequences: - Loss of trust in the hybrid model. - Project failure. - Higher costs and longer timelines. Example: in industry, companies tried running capital construction projects in sprints - in the end, neither Agile nor Waterfall worked. Cultural resistance to Agile requires a culture of openness, autonomy, and trust.
In large CIS corporations with a strong hierarchy, this is difficult. Consequences: - Resistance from middle managers who do not understand the shift in role from controller to a bridge between teams and strategy. - Conflicts between the "old" and "new" management schools. - Delays in scaling. Example: in banks, old-school employees often see Agile teams as "unmanageable startups".
Solution - launch training programs and coaching.