Some of the challenges can stem from the size of the site, which could range from something like 10,00 to 10 million pages.
A large organisation is normally a complex entity, and many of these large organisations may make these decisions by committee or review all decisions with a committee before actually finalising them.
Many important projects whether they are SEO or not can be delayed or even cancelled with a large organisation mostly due to a lack of understanding by a single key player. In the SEO world, efforts are often delayed by someone in IT development, marketing, sales or management and it can be challenging to get a meeting with the people that really matter and you need to persuade, let alone accomplish the task of persuading them.
Patience and persistence are essential, and adhering, to the following large organisation SEO guidelines are recommended:
If possible get buy in, from the head of IT, the head of marketing, the head of sales, and senior management. These people are likely to control your fate, if you are able to get two or three of department heads or senior management on board you should be in good shape.
You should insist on a sound web analytics plan, a successful SEO project depends highly on quality analytics information. If your company is stuck in this situation and can’t get out, yet you have the support for implementing SEO, look at other KPIs, such as rankings combined with search volume and the estimated clicks per position, in the search results.