The document provides information about the building construction tendering process including: 1) Contractors should be invited to tender 4-6 weeks before the tender date to allow adequate preparation time. The maximum number of contractors allowed to participate is typically 6 due to expenses of preparing tenders. 2) Contractors cannot make changes to their tender offers - they must submit an inquiry at least 10 days before the tender if they have questions. 3) Tender offers can be withdrawn by contractors at any time before acceptance by the investor. Acceptance creates a binding agreement between the contractor and investor. 4) Gantt charts are useful planning tools that show task dependencies and allow assessment of delays. Regular updates

1. Building Construction Technology I
Practical Session no. 4
16.04.2012
Answer these Questions :
- When should the Architect or the Investor invite the contractors to the tender (
how many days before the tender) ?
(4-6 weeks)
- The restriction on the number of the contractors that can participate in the
tender is due to what? And the maximum number of participants is?
(is due to the expanses that they have to pay. And the maximum number Is 6)
- How much time can be given to prepare the tender documentation?
(it depends on the size of the project, for smaller once it is about 3-4 weeks)
- What is the procedure of changing the tender offer? Who can do that and how?
(contractors should not make any changes. They should instead send an enquiry min. 10 days
before the tender date. Architect should send a reply to all contractors to provide them all the
same chances)
- Explain the withdrawal of the offer?
(tender offer can be withdrawn by the contractor at all times, as long as it has not been chosen by
the investor. Acceptance of an offer constitutes an agreement between the investor and
contractor)
- Which alternatives have the contractors when the designer find an error in the
tender documentation?
( "Alternative 1" – where the contractor can confirm or withdraw the offer and "Alternative 2" -
where the contractor can confirm the offer or correct mistakes)
- Who is responsible for surveying the works?
( the Contractor )
- Bill of quantities is: (a list of all required works (with all measurements already made) – the
contractor needs to provide their rates for each of the works.)
- Write something about Gantt chart: (Gantt or Bar chart is the easiest available planning
technique, and probably the only one commonly understood without prior training. Despite its
simplicity, a correctly designed chart will provide a lot of information necessary to complete the
project. Each line on the chart indicates a task or group of tasks necessary in the project. The
length of a bar is relative to the time necessary to carry out a task. Individual tasks stand in

2. dynamic dependency relationships that reflect the order of completion. This allows for a fast
check of how, e.g. a delay of task A will influence the completion of task C, taking place 2 months
later. )
- Purchase schedule is used for: (which indicates the deadlines for making orders. All data is
dynamically related, and therefore if the installation of windows, which have to be ordered 4
weeks in advance, is delayed, the schedule will automatically suggest new order date.)
- Mention two problems of schedules? (One must bear in mind that schedule is a dynamical
tool which needs to be regularly updated in order to serve us most efficiently. Every construction
plan is appropriate only until the project has started. It can be often seen, that our plans do not
reflect reality, in which case the plan must be updated, otherwise it will lose its adequacy. Plan is
only as good as the person who created it. Software is only a tool, not a magical solution to all our
problems. If the project deadline we set is not realistic, there is no plan which will make
completion on time possible.)