Summary
Key results
16-person mobile delivery team built within weeks
ViGuide mobile app delivered on time
Fast team ramp-up to meet delivery targets
Viessmann needed to build a reliable mobile delivery setup within a short timeframe to support the ViGuide roadmap and ensure the product could be released on time, without compromising quality or specification requirements. Sii was selected to assemble the required mobile team and establish the delivery model within weeks.
In terms of staffing, the challenge was not only to ramp up quickly, but also to ensure the right team structure, quality standards, and delivery of ownership from day one.
Meanwhile, from a development perspective, this was essential for ViGuide, a mobile application designed to support technicians working in the field, helping users remotely monitor connected heating installations.
The app had to provide quick access to installation data, including customer information, system specifications, operating status, serial number, and communication module identification.
Given the delivery pressure and the need for a reliable setup across mobile platforms, Viessmann chose Sii as a partner that could quickly establish the right delivery model and take responsibility for execution.
Handpicked mobile team for ViGuide delivery
The final team reached 16 full-time experts and continued to work under Sii-delegated Scrum Master responsible for deliverables. The broader setup included iOS and Android developers, testers, Scrum Masters, and business analysts.
The scope of work included:
- Delivery setup and scaling – establishing the mobile delivery team within a short timeframe
- Expert qualification – matching team members to the client’s technical and delivery requirements
- Mobile product development – supporting ViGuide delivery across iOS and Android environments
- Quality assurance – helping ensure app reliability and smooth performance through testing and QA processes
- Scrum leadership – providing delivery coordination through Sii-led Scrum Master
Efficient services resulting in shorter time-to-market
Sii enabled Viessmann to move forward with a key mobile product without losing time on lengthy internal ramp-up and team organization. Sii built a working Scrum setup that helped Viessmann move forward with on-time product delivery. By establishing a 16-person delivery setup within weeks, Sii reduced the risk of delays and helped the client meet internal commitments on time.
The quality of expert qualification was a clear differentiator. Viessmann was impressed by how thoroughly Sii evaluated each person compared with other partners, outperforming vendors with a stronger candidate vetting process. This reduced the risk that often comes with rapid ramp-up and helped create a team ready to contribute from the start.
The cooperation also created a stable foundation for further product development. ViGuide was designed to support field technicians and remote monitoring of connected installations, and the application went on to exceed 50 000 downloads in Google Play while receiving strong user reviews. With delivery coordinated by Sii-led Scrum Master, Viessmann gained not just execution capacity, but also a team structure that supported continuity, accountability, and further growth of the product.
Key results
- 16-person mobile delivery team built within weeks and led by Sii’s Scrum Master
- ViGuide mobile app delivered on time for headquarters
- High ratings maintained from both the client and end users
- Reliable delivery setup enabling continued product development