Understanding and accurately assessing a water utility’s current operational level is essential. Only once this baseline is clearly documented and validated can effective improvement plans be developed to guide progress toward higher levels of performance. It is not uncommon for utilities to overestimate their operational maturity, which can result in underestimating the effort, resources, and time required to improve system efficiency. Advancing operational performance involves a range of processes—some straightforward, others more complex, many of which require thoughtful investment and sustained effort. The WSI Calculator is a practical, multilingual tool designed to help utilities easily evaluate their current level of operational performance. It also provides clear guidance on how to progress to the next level through targeted, sustainable improvements.
The Excel spreadsheet contains macros, which are used in the calculations. Once the file is downloaded 'cut' and 'paste' the spreadsheet from the zip file onto your desktop or chosen folder. Right click on the excel file, do not open it, and click on "Properties". From there please see the image on the left on unblocking macros before opening the excel file. Press 'Apply' and then 'OK' to finish the procedure. After this open the file as normal.