I am conducting a study on evaluation of ECD policy implementation and quality service delivery. Therefore, looking for a tool which would help me to quantify quality of the pre-schools environment in Murang'a Kenya
Suggest you try application of ISO 2859 (find here a link for pdf downloading; https://fenix.tecnico.ulisboa.pt/downloadFile/845043405432427/iso2859-1.pdf) that is a statistic based tool of general application can be used for your specific quantification of the the leads you need to evaluate to built a model of the level of quality in the aspects are set as key factors contribute to a good quality ECD environment in place.
There is some calculators you can reach (http://www.sqconline.com/military-standard-105e-tables-sampling-attributes) for your use in the web as well works pretty well for wide spectrum scenarios like the one your are looking for scientifically set for evaluation and comparission objectives.
Mil Standard 105E was developed for quality measurement and assurance afterwards adopted by ISO and served as base for ISO 2859.
Kindly reach out to Dr. John Ng'asike of Mount Kenya University, Early Childhood Studies Department , Thika Main Campus for assistance. He is a specialist.