Flow - Business Improvement Consultancy
Flow - Business Improvement Consultancy helps operations-focused organisations improve performance through Lean Six Sigma consulting and ILSSI-certified training. Services include diagnostics, improvement sprints, coaching and capability programmes that embed continuous improvement and deliver lasting results.
Flow - Business Improvement Consultancy is a Cambridgeshire-based business improvement consultancy helping operations-focused organisations turn firefighting into flow. I combine hands-on Lean Six Sigma consulting with ILSSI-certified training so you get measurable results now and the internal capability to sustain them.
Typical work includes rapid process mapping and data review to identify high-impact opportunities, facilitated improvement workshops/sprints to remove bottlenecks and failure demand, and simple dashboards and controls to keep performance visible. Engagements range from a 2-3 week Flow Diagnostic, to 8-12 week Improvement Sprints, through to 6-12 month capability programmes that build an internal Lean Academy.
Founded by Bart Siwek (Lean Six Sigma Black Belt), Flow has trained and coached 150+ professionals and supports sectors including logistics & supply chain, procurement/back-office, shared services, and scientific/research environments. Training can be delivered self-paced online with coaching, live online, in-person, or blended - tailored to your teams and priorities.
When flow is achieved, Operational Excellence feels invisible - because work simply gets done.
Products and services
Bespoke Lean Six Sigma Consultancy (tailored support)
If you don’t fit a “package”, Flow BIC also provides bespoke support tailored to your needs. You work directly with an experienced Black Belt, combining analysis, facilitation and coaching to make improvements stick—working side-by-side with your teams through workshops, coaching for project leads, and putting simple, sustainable controls in place.
Continuous Improvement Capability Programme (6–12 months)
A longer-term programme combining consultancy with ILSSI-certified Yellow/Green Belt training tailored to your context. We shape a pipeline of real improvement projects, train a cohort using your processes, run monthly group coaching clinics, put in place simple CI governance (huddles, boards, templates), and provide clear reporting on projects/benefits—supporting the creation of an internal Lean Academy and lasting CI culture.
Flow Diagnostic (2–3 weeks)
A focused review of a key process or area. We map how work currently flows, review available performance data and failure examples, then identify 3–5 high-impact opportunities (plus quick wins) and provide a simple improvement roadmap. Ideal when you’re dealing with backlogs, rework, missed SLAs, or limited visibility/ownership across an end-to-end process.
Improvement Sprint (8–12 weeks)
An intensive, hands-on improvement project on a priority process (e.g., customer onboarding, order fulfilment, lab testing, or a key support workflow). We clarify the problem, objectives and measures, run focused Lean Six Sigma workshops (root cause analysis, redesign), test and implement changes with your team, and set up basic performance monitoring and control—designed to deliver visible results within one quarter.
ILSSI Certified Lean Six Sigma Green Belt (5-Day, Tailored Programme)
A 5-day intensive programme to develop confident improvement leaders who can run structured projects and deliver measurable results. Delivered on-site or live online and tailored to your organisation, it builds capability in DMAIC, Lean tools, and practical data/statistics (e.g., capability, correlation/regression, basic hypothesis testing), plus control plans to sustain gains. For in-house cohorts, this includes a pre-course scoping call, plus reusable templates/tools and guidance on scoping/chartering/reporting projects; post-course coaching support is available on request.
ILSSI Certified Lean Six Sigma Yellow Belt (2-Day, Tailored Course)
A 2-day, highly interactive Yellow Belt course delivered on-site or live online, tailored to your processes. Participants learn to spot waste, map and understand processes, use core Lean tools (e.g., 5S, standard work, visual management), and contribute confidently to improvement work using practical root-cause tools and DMAIC basics. Includes an International Lean Six Sigma Institute online exam and downloadable certificate.
ILSSI Self-Paced Online Lean & Lean Six Sigma (White, Yellow, Green, Black Belt) + Coaching
A flexible route to internationally recognised Lean / Lean Six Sigma certification (White, Yellow, Green and Black Belt) without stepping away from your day job. Learning is delivered via a 100% online platform with a clear module pathway, practical assignments, and regular 1:1 coaching to help you apply tools to your real processes and prepare for International Lean Six Sigma Institute (ILSSI) certification. Includes 6 months’ access (extension options available) and structured support throughout.