Impact of poor organizational culture

What is the impact of poor organizational culture on business performance? The short answer: it impacts every aspect of the business! Financial success, operational efficiencies, flow of communication, client and stakeholder certainty, to name only a few.
Is organisational culture an integral part of your organisation’s strategic plan? If not, why not? Can the Board of Directors and the SLT afford to neglect this strategic element? Please share your experiences and thoughts, I would love to hear from you!