• Almost all construction projects

• Almost all construction projects are unique. They are
single-order, single-production products.
• Unlike other industries, which usually have a fixed site
with similar conditions for production, each construction
production site always displays different conditions.
• The life-cycle of a construction project is much longer
than the life-cycle of most manufactured products.
• There is no clear and uniform standard in evaluating
overall construction quality as there is in manufactured
items and materials; thus, construction projects usually
are evaluated subjectively.
• Since construction projects are a single-order design project,
the owner usually directly influences the production.
• The participants in the construction project--owner,
designer, general contractor, subcontractor, material
supplier, etc.--differ for each project.