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Tom APC 2023 > Design Economics And Cost Planning > Flashcards

Design Economics And Cost Planning Flashcards

1
Q

What does TPI stand for

A

Tender price indices

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2
Q

What does CPI stand for

A

Construction price indicies

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3
Q

What’s the difference between value management and value engineering

A

Value management is usually done at RIBA stage 0 or 1 and manages the value at a high level of the key elements

Value Engineering is done when the design is more developed and specific aspects are decided to improve value

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4
Q

How many numbered points are there in a cost plan as per NRM1

A

15

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5
Q

When is CPI taken

A

At the mid point of the construction programme

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6
Q

When is TPI taken

A

At the point of tender

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7
Q

Who produces SPONS

A

AECOM

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8
Q

Why is it important to have regional prices

A

Because material prices vary across regions (and labour if self employed)

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9
Q

Who produces BCIS

A

RICS

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10
Q

Are balconies included in the GEA

A

No

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11
Q

Where would you check to find out what’s included and excluded from GIA GEA and NIA

A

NRM1

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12
Q

Pros and cons of steel compared to concrete frame

A

Pros

Fast erection on site

Comparatively Lightweight

Gain more net internal area due to columns and beams being smaller

Cons

Inflation/ market uncertainty

Fire proofing costs

Prone to corrosion

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13
Q

Pros and cons of concrete frame compared to steel

A

Pros

Naturally Fire and Water resistant

Easy to mould and shape

Energy efficient when producing

Higher compressive strength

CONS

Low tensile strength and so requires reinforcement

Long curing time/ slower installation

Requires form work on site

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14
Q

What are some typical exclusions in a cost plan/ order of cost estimate

A

VAT

S106/ CIL

Prof fees

Finance Costs

Acquisition Costs

Inflation

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15
Q

What cost of advise would you give to a client at RIBA stage 1-4

A

Stage 1 - design was restricted to schedule of annotation and high level design aspirations. Using internal and industry data and the GIFA I could provide a high level estimate.

Stage 2-4 - Can provide an elemental costs plan which is updated as design develops based on drawings and specifications

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16
Q

How did I decide on the contingency level in my order of cost estimate

A

With the input of the project design we would produce a risk register.

My duty would be to advise the team on the cost allocation if the risk item should be realised.

By pricing the register and assigning probability and impact profiles the contingency can be calculated.

17
Q

Define an order of cost estimate

A

The determination of possible cost in the early design stage based on the employers fundamental requirements

18
Q

How would you advise the client to proceed if the cost plan exceeds the budget

A

Analyse the costs to assess the source of the increase and whether any element is abnormally high.

Propose value engineering

19
Q

What would you do if you don’t have the design information to populate an element of the cost plan

A

I would make an assumption and check with the design team to ensure it was correct

20
Q

What items did you price/ measure when valuing the concrete frame

A

Columns

Beams

Slabs

Reinforcement/ Rebar

Delivery

Labour

Plant

Delivery

21
Q

What items did you price/ measure when valuing the steel frame

A

Beams

Columns

Fire and Water protection

Fixings

Delivery

Labour

22
Q

What types of efficiency calculations are there when it comes to design economics

A

Wall to floor ratio

Net to gross ratio

23
Q

What does the net to gross ratio do

A

It outlines the area of usable space as a ration of the gross internal area.

It’s can identify how much wasted space there is

24
Q

How do you calculate wall to floor areas

A

External wall area divided by the gross internal floor area

25
Q

How do you calculate the net to gross ratio

A

Gross area divided by the net area

26
Q

What items did you price/ measure when valuing the PV charger variation

A

PV Chargers

Ducting

Trenching

Power

Labour

27
Q

Name the main sources of costs data

A

Internal data

Quotes

BCIS

SPONS

28
Q

What’s a functional unit

A

A unit of measurement representing the prime use of a building

29
Q

When is the GEA often used

A

Planning submissions

30
Q

How do you decide on the value of prelims in a cost plan

A

On a % basis (12-15%)

Bench mark a cost per month and allocate to the programme duration

31
Q

How would you calculate the BWIC costs

A

As a % of the M&E

32
Q

What’s the rough rate for reinforced concrete in situ

Foundation

Slab

Beam

Column

Walls

A

Foundations (not piles) - £190/m3

Slab - £200/m3

Column and Beam - £250/ m3

Walls - £220m3

SPONS 2023

33
Q

What’s the rough rate for steel frame columns and beams

A

£2500/ tonne

34
Q

Price of a pile

A

£3000per pile 750mm thick

35
Q

What units are the following measures in

Concrete in situ

Steel frame

Piles

Windows/ cladding

Floor finishes

A

In situ concrete - m3

Steel Frame - tonne

Piles - nr

Windows/ cladding- m2

Floor finish - m2

36
Q

Price of a steel and concrete frame overall

A

Steel - £300/m2

Concrete - £280/m2

37
Q

Green and blue roof price

A

£150m2 - green

£130m2 - blue

Tom APC 2023 (17 decks)

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