Purpose: The aim is to examine if the joint-use strategy of Lean Six Sigma can improve flexibility, robustness, cost-efficiency, and agility at the same time.

Design/methodology/approach: A single case study including a Swedish company from the telecom manufacturing industry was conducted.

Findings: A Lean Six Sigma strategy ensures more flexible, robust, and efficient processes. However, to make them agile, something more is required. This could include training the staff, strengthening company culture and collaborating with key partners in the supply chain.

Research limitations/implications: This study is limited to large companies that usually have a lot of resources and choices where to put the strategic emphasis. The situation could be very different in small and medium-sized companies.

Practical implications: This research provides guidance on how to manage the Lean Six Sigma strategy in order to ensure more flexible, robust, and efficient processes.

Originality/value: This research provides guidance to companies regarding the applicability and properties of the Lean Six Sigma strategy.