OD is about improving your organisation's overall effectiveness through carefully balancing the intricacies of people & process. In practice, this may involve different areas and as such it can look different one company to another. And that's because every company is different. Just like every individual has different stories, each company as a collective of individual stories have a distinct story and culture.
At its heart, organisation development is about navigating changes to improve effectiveness by working in partnership across a whole system,
where change is considered as any disruption of a repeated pattern of thinking, feeling or behaviour.
Source : Space for Learning & Still Moving