In the situation where your customer (the engineering company, or end user) provides you with a numbering scheme for your document register, why not let DocBoss do the hard part?
By simply identifying the make-up of the customers numbering scheme i.e. “<DocCode>-<Sequence #>-<Sheet#>”, DocBoss will assign numbers to your entire register. Of course – we keep track of when you TELL someone about these numbers – and then we lock them down for you. But before that – make all the changes you want. No one’s watching.