Tell me about a time when you disagreed with your boss

i always  remain calm, however in my last project i have given the methodology that were not useful for customer needs. i accepted but it didn't work until i had deep down discussion with my line manager and suggest the best way to  dealt with the situation, i defended my case proffesional and with evidences, and got accepted.

It was when we were preparing data for warranty negotiation, my boss asked me to prepare data past 3 years back but I didn’t agree because data should be data to be used since last negotiation on 2018.

I told my boss about history of this topic and told her that the more sample we had, the more   opportunity to win negotiation.

then I prepared 2018-2024 data and reviewed together, we found that by comparing data between 2020-2024 and 2018-2024, warranty responsibility is much lower. We both agreed to use 2018-2024 data for negotiation and the result as we expected, we got the ratio as we proposed.

At Auctane, while my team was in the middle of the rewrite - for refund module, The PMs wanted a new feature to the legacy system, I pushed back on the switch as it would cause a lot of churn for my team. PM got my Manager involved and convinced that this was a good idea to release new feature on monolith. My manager aggreed for this swap, I was disaggreed with this decision but commited to the change in direction.

I breifed my team with this change, and we could accomate the feature request after negotiating the scope of the microsystem re-write.

i haven’ encountered a situation like this.However if I found some idea wrong I will challenge it with respect and professionalis,If i were to face this situation in future my approach would be open communication and understanging each other perspectives and discussing potential solution to find common grounds through which we can move towards a unified direction