Hi Yours is a common issue and is a mine field. I have used a number of companies to support my cleansing projects and have found the quality very poor, and I have also audited many datasets carried out by so called experts. You are lucky that you are using Maximo, as you do not have character length limitations. I have now developed my own tool with many features to streamline the validation and cleansing process and even incudes PICS to show what the item looks like. Currently it holds over 385,000 p/ns and over 3000 templates. There are a number of options to cleansing depending on the current quality and you need to make rules. I do conduct various training courses on all aspects of managing and optimising spare parts incl best practice cataloguing using MS Access. I also have a Linked Group for Optimising Spare Parts (there are two one i manage and 1 the Asian based Training Organiser manages. I have posted lots of ppts, but not recently as I have been quite busy. if I can help, e mail me at dave@ramsoftuk.com