Style guides, manuals and job descriptions are examples of what type of knowledge?

An analyst investigating a sales system wishes to ask questions about how a customer order form is completed in the current system.
What investigation technique is the analyst using?

A convenience food manufacturer has undertaken a strategic analysis study and has identified a threat from groups lobbying against the use of packaging for food products.
Which of the PESTLE categories would have helped highlight this threat?

What do the arrow headed lines between activities represent on a business activity model?

Every night, at midnight, a system automatically raises invoices for customers that have placed orders that day. The invoice is sent electronically by email to customers.
What is the event that triggers the production of invoices?