Just a word of warning.
If you add 5 minutes per day in additional time because you want to protect against this happening again, that starts to add up.
This has happened to you once in 8 years. 5 mins x 250 days per year x 8 years = 10,000 mins or 166.66 hours. At £40 per hour thats £6,666 worth of time. Whilst I appreciate that this was embarrassing, would you have paid over £6k to prevent it from happening?
And it doesn't protect you from the next random, once-in-eight-years risk.
So I don't want to put you off sensible and proportionate measures, but I would counsel against the risk of over-reaction.
Lots of large organisations are paralysed by excess procedures. They all start like this.
- Something bad happens.
- Decide something must be done about the bad thing.
- Look around for something credible to do which would counteract the bad thing
- Implement anti-bad thing procedure.
- Explain to boss/wife/self how clever you are in introducing the new procedure, so the bad thing can't happen again.
- Return to work
- Another, different bad thing happens.
- Repeat process from stage 2
After a few hundred iterations, you have a procedure manual longer than the Bible.
Nothing gets done. But it gets done ever so safely.
And nothing bad ever happens ever again. Until the next time.