Terne Vishart
MANAGING PARTNER
Terne is an expert in leadership and organisational development with vast experience helping private and public organisations set and achieve ambitious goals. She specialises in strategy development and implementation across sectors including production, governance, digitalisation, environment, and transportation.
She has a unique ability to help leaders identify and solve the most pressing challenges facing their organisations. A brilliant facilitator, she brings deep knowledge of design thinking, lean, and co-creation — combining these methods to drive transformation and maximise value.
As Managing Partner, Terne plays a central role in planning and executing assignments at BY ERROR, building the structures and culture that enable growth among clients and employees alike.
Kristian Fevejle
PARTNER
Kristian helps organisations strengthen their strategic direction and operational focus through data-driven analysis, supporting leadership teams in navigating transformation with clarity, structure, and a sharp eye for impact.
He brings extensive experience in business transformation and operational leadership, with a proven track record across highly regulated sectors, including healthcare, health tech, and rail infrastructure. Kristian works closely with senior management to develop business models, build robust business cases, and ensure strategic decisions are grounded in solid evidence and insight.
Known for bridging strategic thinking and practical execution, he delivers tangible outcomes by identifying the right opportunities and driving structured, evidence-based progress — rooted in a deep understanding of how organisations create lasting value.
Nis Launtoft
SENIOR CONSULTANT
Nis is a Microsoft Power Platform specialist with profound expertise in IT systems and integration. He brings extensive experience in organising complex processes and data, helping clients understand and solve complex problems with clarity and precision.
With a background in business analysis and system development, he has hands-on experience designing, developing, and implementing systems — with a keen eye for how technology supports people and processes.
A true team player, Nis has a unique ability to make others shine, working behind the scenes using data to uncover new insights. He brings experience from highly regulated sectors, including financial services and rail infrastructure.
Michael Bang
SENIOR CONSULTANT
Michael helps organisations design, develop, and apply IT in ways that improve both processes and products.
He works with management teams, specialists, and end-users to build robust architectures and applications that reflect the complexity of technology, safety, and organisational culture. Michael has extensive experience from highly regulated environments, including pharma, banking, rail and law enforcement, where reliability and compliance are business-critical.
Michael is used to planning and leading large-scale transformations at both business and organisational levels. He collaborates with senior management and technical teams to analyse and solve complex problems based on data and end-user experience, typically using agile methods to ensure momentum, learning, and tangible results.
Kasper Høegberg
SENIOR CONSULTANT
Kasper is a specialist specialist in general medicine with extensive knowledge and experience across all sectors of the healthcare system, including municipal and private practice.
By leveraging his broad clinical expertise and deep organisational insight, Kasper supports our clients through analysis, optimisation, and development of healthcare services.
Kasper´s background includes significant experience as a general practitioner and medical advisor, as well as clinical roles in five somatic hospitals and one psychiatric hospital in the Region of Zealand and the Capital Region.
Olivia Mathiessen
JUNIOR CONSULTANT
Olivia is working with data analysis, process coordination, and organisational development. She helps clients structure complex data to identify patterns and develop solutions that improve quality and efficiency.
With a sharp analytical mindset and a talent for cross-disciplinary collaboration, Olivia thrives where overview and teamwork go hand in hand. She brings experience from leadership, project coordination, and governance – and she is a brilliant at communicating, no matter the audience.
Olivia is driven by business improvement, learning, and development – both at people and organisational level. She also writes exceptionally well and has a knack for turning complexity into clear, compelling communication.
Roxy Lang
STUDENT ASSISTANT
Roxy supports our day-to-day business through communication and outreach activities, including event planning and meeting preparation. She brings a bright mind and impressive experience with social media, with some of her content reaching over 1.7 million views and more than 300,000 likes.
Roxy's energetic and inspiring attitude, combined with a clear communication style, enables her to connect easily with people and build strong relationships across all levels.