Me: What's happened here? Oh, you've changed the methodology and tariffs without warning or approval. You know that'll render any data points impossible to compare and that if it's attempted, it'll make everybody look like they're doing a tit job?
Them: I don't care, it's easier this way.
Me: Okaaayyyyy. <sends off email to manager making sure they're aware of the consequences> <manager confirms they are aware of this, as is executive level, who have decided it's totally unimportant and won't make any difference at all>
Me: Here's the most recent data. As I previously said, it's not possible to compare to the previous data point due to the change in methodology and tariffs. And that's why it appears that performance has plummeted.
Radio silence.
Other person: <knocks on door> Can you help me with this? <forwards email from executive level>
Me: So they're wanting you to 'explain yourself' because the comparison between the two data points makes it look as though you are doing a tit job? With zero notice or an actual copy of the datasets for you to refer to or show that the original information is now utter junk?
Other person: Yep.
Me: Conveniently enough, I can replicate the analysis using only the current methodology to provide a direct comparison between the two dates. Would you like me to provide that information to you?
Other person: Oh, yes please.
Me: I take payment in plants, posh coffee and snacks. Tuesday morning at 10am alright for you to go through it?
Other person: Just how big a plant, coffee and snacks are we thinking of?