A brief phone call with HR staff to check if you meet the eligibility criteria and some basic questions like salary expectations. Then its up to a Senior Consultant if they like your CV and decide to progress forward. If they do then you will get scheduled an hour long interview with a Consultant team member which will mostly focus on yourself and your CV. If you are successful then you will be put forward to a group case study, where you will be primarily assessed on teamworking skills. Then finally if you pass that stage then you will have a 30min "fit" interview with a Senior Partner to determine if you fit the company culture.
Overall a complete waste of my time. First submitted a CV in April, did the initial phone call about 2 weeks later. Then nothing happened until the end of July, when they emailed out of the blue to announce they wanted another interview in 2 weeks. That went well, and so I got invited to a group interview a month later (now September). The group interview is complete chance, if you get paired with reasonable people you will pass, if not then you will fail. Luckily the group I was ended up with was competent, and a week later I was put forward for a final interview. This also seemed to go well, although the senior partner emphasised how their consulting department (defence) was complete anarchy with essentially no matrix structure in place. Finally he dropped the bombshell that the position I was applying for was in fact a Senior Consultant/Management Consultant position, and that he wasn't sure if I had the experience for the job (despite passing every stage of the interview well). Despite it going positively I haven't had any feedback at all provided, even when emailing specific people from their recruitment team I have interacted with who even offered to reach out and provide some during the process.
What a pointless exercise. Next time make sure you actually advertise the job you are actually hiring for, don't pass people to the very final round if you don't think they are suitable and stop ghosting people when they ask for feedback. Terrible overall, would not recommend, probably done me a favour in hindsight at least. If their consulting skills are as good as their recruitment then Invent deserve their reputation.