Kassu already send you an extended lists of possible sources.
From a Quality point of view, I do like very much the APQP Automotive Industry Methodology: QFD, Product FMEA, Process FMEA; MSA, Process Capability Study/SPC study, Control Plan. It should assure that your process in under statistical control and has a good process capability to deliver quality product to the customers (a bit heavy methodology for many organizations, but …).
Environmental speaking, there is an ISO standard for this purpose: ISO 14044, Environmental management — Life cycle assessment — Requirements and guidelines. However, in my view, many times you do not need to do a full LCA, a simple consideration of the life cycle stages which can be controlled or influenced by the organization might be sufficient. For this purpose the organization may obtain this information directly or seek it from the supplier of the products and services. Information already developed for regulatory or other purposes may be used in this process. Typical stages of a product life cycle can include, for example, extraction of raw materials, design, production, transportation, use, and end-of-life treatment. The life cycle stages that are applicable will vary depending on the activity, product or service.
SA8000, available for download at Social Accountability International web site (http://www.sa-intl.org/) might be of interesting to you for social impact and they have good lines on how to interpret and apply it.
And if you want to make it really summarized, why not use CANVAS strategic model (1 page, available at http://www.canvaslms.eu/).
I used a model to research the influence of Sustainability/CSR programs in Organizational success (mediated by stakeholders satisfaction) for my PhD Thesis (framed on Stakeholder Theory and RBV) but looking back, it is a very heavy and quantitative demanding approach and is written in … Portuguese.
The area covered by my question was very broad indeed, so I am really grateful for giving me so many and so "diverse" inputs.
I still have to go through the sources you provided, and as a result I do not have any specific comments or questions upon them up to now, but...it is likely that they will come in the future, if any!